• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a tread (2), said tread comprising a running surface (20) and a plurality of grooves (21), at least one groove having, in section, a generally undulating shape with parts of fully open grooves (210) on the running surface (20) and closed groove portions (211) wholly or partly on said running surface (20). The tire is characterized in that the open groove portions (210) comprise a contrasting texture (3) in the tread, the texture (3) having a plurality of protruding or recessed elements with respect to the surface of the groove.
    公开号:FR3018222A1
    申请号:FR1451916
    申请日:2014-03-10
    公开日:2015-09-11
    发明作者:Stephanie Cambon；Jonathan Lejeune
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [1] The present invention relates to a tread for a tire, said tread having a tread surface and a plurality of grooves. [2] The invention also relates to a tire comprising such a tread. STATE OF THE ART [3] In order to mold the tread of a tire, it is known to use molding elements fixed in a mold. By molding element is meant any element of the mold which has a molding surface for molding a part of the tread of a tire. A molding element can thus be a block assembled on a sector of the mold or a bead attached to the radially inner surface of the mold. [4] It is possible to make a molding element by a selective melting process more commonly known as sintering. This process uses an energy beam to fuse a metal powder. "Energy beam" means an electromagnetic radiation (for example a laser beam) or a particle beam (for example an electron beam). [5] A sintering process using a laser, hereinafter referred to as a laser sintering method, is known from EP1641580. In this document, a first layer of metal powder is spread on a tray. All or part of the grains of this first layer of powder are then agglomerated by the beam of a laser according to the shape of the object that one wishes to obtain. Once this step is performed a second layer of powder is spread on the first layer of powder to be in turn selectively fused by laser. By repeating these layer spreading and laser melting operations, a sintered object is built layer by layer. [06] Such a sintered object is particularly shown in Figure 3 of EP0868955. In this figure, it is easy to distinguish the strata structure of the sintered object which is a molded element intended to be attached in a tire mold. However, this layered structure shows in the grooves of the tread level lines which are a reflection of this structure. This phenomenon of level lines is increased by the curvilinear nature of the mold. These level lines give the tire an unsightly appearance. [07] WO 2011/039194 discloses a tire comprising a tread having a plurality of grooves. Each groove has, in sectional view, a generally undulating shape with fully open groove portions on the tread surface and closed groove portions. [8] There is a need to provide a solution allowing the use of the laser sintering process to manufacture the mold for molding a tire provided with corrugated grooves while attempting to improve the aesthetics of this tire. DEFINITIONS [9] By "tire" is meant all types of elastic bandages 20 subjected to internal pressure or not. [10] "Rubber material" means a diene elastomer, that is to say in known manner an elastomer derived from at least in part (ie homopolymer or copolymer) of diene monomers (monomers carrying two carbon-carbon double bonds, conjugated or not). [11] "Tread" of a tire means a quantity of rubber material delimited by side surfaces and by two main surfaces, one of which, called the tread surface, is intended to come into contact with a tire. when the tire is rolling. [12] By "texture" is meant a set of organized elements. [13] "sidewall" of a tire means a side surface of the tire disposed between the tread of the tire and a bead of the tire. [14] "Strand" means a filamentary element whose height is at least equal to twice the diameter of a disk of the same area as the average section of the strand. [15] "Slats" means elongated strands having a length at least twice their height.
    [0002] SUMMARY OF THE INVENTION [16] The invention relates to a tread for a tire, said tread having a running surface and a plurality of grooves, at least one groove having, in section, a shape generally corrugated with fully open groove portions on the tread surface and groove portions wholly or partly closed on said tread surface. The open groove portions comprise a contrasting texture in the tread, the texture having a plurality of protruding or recessed elements with respect to the surface of the groove. [17] Using a texture in the open parts of the groove masks the presence of level lines in this groove. [18] In a non-limiting embodiment, texture is absent from closed groove portions. [19] The texture is used to create a visual contrast with the tread parts that do not have this texture. In the case where the texture is present in a groove, this visual contrast accentuates the depth of this groove vis-à-vis an observer of the tire. From a certain state of wear of the tread, the groove parts closed groove open. By not covering these groove parts closed with the texture, it is then possible to mislead the observer on the actual state of wear of his tire. [20] In a nonlimiting embodiment, at least 30% of the protruding elements of the texture makes an angle α greater than 40 ° with respect to a plane tangent to the surface of the groove and at most 25% of the elements. protuberance of the texture makes an angle less than 20 ° relative to the tangent plane. [21] This further enhances the ability of the texture to trap light. [22] In one nonlimiting embodiment, all or part of the protruding elements are strands distributed in the texture at a density of at least one strand per square millimeter (mm 2), each strand having a mean cross-section between 0.003 mm 2 and 1 mm 2. [23] In another non-limiting embodiment, all or part of the elements in protuberance are slats substantially parallel to each other, the pitch of the slats in the texture being at most equal to 0.5 mm, each slat having a width average between 0.03 mm and 0.25 mm. [24] In another non-limiting embodiment, all or part of the protruding elements form side parallelepipeds between 0.05 mm and 0.5 mm, with a height of between 0.05 mm and 0.5 mm. the distance between two adjacent parallelepipeds in the texture being between 0.05 mm and 0.5 mm. [25] In another non-limiting embodiment, the protuberance elements present in the texture shapes and distances between elements in variable protuberances. [26] In a non-limiting embodiment, the recessed elements form apertures on the surface of the groove and the texture comprises a plurality of openings, these openings being distributed in the texture according to the invention. a density at least equal to one opening per square millimeter (mm 2), these openings having equivalent diameters of between 0.03 mm and 1.2 mm. [27] The texture thus has great durability. Indeed, as this texture is composed of hollow elements with respect to the surface of the groove, the impact of friction with pebbles on this texture is low. [28] There is also provided a tire comprising a tread according to any one of the preceding features.
    [0003] BRIEF DESCRIPTION OF THE DRAWINGS [29] Other characteristics and advantages of the invention will emerge from the following description, given by way of example, without being limiting in nature, with reference to the appended drawings, in which: FIG. perspective view of a portion of a tire comprising a tread according to the prior art; FIG. 2 schematically represents a sectional view of the tire tread, said tread comprising a groove with a texture according to the invention; - Figure 3 shows schematically a sectional view of a groove of the tread of Figure 2 with the particular texture; FIG. 4 represents part of the texture of FIG. 2, according to a first embodiment of the invention; FIG. 5 represents part of the texture of FIG. 2, according to a second embodiment of the invention; FIG. 6 represents part of the texture of FIG. 2, according to a third embodiment of the invention; FIG. 7 represents part of the texture of FIG. 2, according to a fourth embodiment of the invention; FIG. 8 represents part of the texture of FIG. 2, according to a fifth embodiment of the invention; and FIG. 9 represents an enlarged view of a cavity of a recessed element of the texture of FIG. 8. In the following description, substantially identical or similar elements will be designated by identical references. [31] Figure 1 shows a portion of the tire 1 having a tread 2 according to the prior art. As can be seen, the tread 2 has a tread 20 and grooves 21. The tread 20 (also called useful area) is intended to come into contact with a roadway when the tire 1 rolls. The grooves 21 (also called sculptures) allow in particular to evacuate the water and thus improve the adhesion of the tire 1 on wet pavement. Due to the laser sintering method used, the grooves comprise level lines 4. In the example illustrated, the level lines are in particular in the groove bottom. [32] Figure 2 shows a sectional view of the tread 2 of a tire 1, according to a non-limiting embodiment of the invention. The tread 2 comprises a running surface 20 and grooves 21. In a nonlimiting embodiment, at least one groove 21 has a generally undulating shape in the depth of the tread 2. In another embodiment non-limiting, each groove 21 has a generally undulating shape in the depth of the tread 2. [33] As illustrated, a groove 21 has a surface and has, in section, a generally undulating shape with parts of the tread 21. fully open grooves 210 on the running surface 20 and closed groove portions 211 in all or part thereof on this rolling surface 20. The open groove portions 210 comprise a contrasting texture 3 in the tread. The open (or external) groove portions 210 open onto the tread surface 20 when the tire 1 is in the new state, while the closed (or internal) groove portions 211 are within the tire tread. bearing 2, in its depth (that is to say 10 under the running surface 20) when the tire 1 is in new condition. When the tread 2 wears, at a certain level of wear, these closed portions 211 open onto the tread surface 20. [34] It will be noted that the closed groove portions 211 are closed on all or part of In fact, said grooves 211 comprise a slot 212 which extends in the depth of the tread 2 and opens on the running surface 20, as illustrated in FIG. 2. This slot corresponds to to a lamella in the molding negative of a groove. [35] In a non-limiting embodiment, the texture 3 is absent from the closed groove portions 211, as illustrated in the non-limiting embodiment of Figure 2. [36] Thus, the fact of using the texture 3 only in the groove portions which are open 210 on the running surface 20 makes it possible, in the new state, to hide the presence of level lines in this groove. Indeed, at a certain level of wear, the closed parts 211 will be discovered and the level lines on these closed parts will then be visible by an observer of the tire. [37] This allows an observer to visually differentiate between the open groove portions 210 (which appear darker) and the closed groove portions 211 (which appear brighter) when the tread is worn and discovers the parts of closed grooves 211. The observer perceives that his tire 1 is worn. [38] Figure 3 illustrates a cross-sectional view of a groove 21. A groove 21 has a groove bottom 213, walls 214 flanking the groove bottom, and transition zones 215 (also referred to as splice areas) between the grooves. walls 214 and the groove bottom 213, these transition zones 215 being curved and radius of the order of 1 mm in a non-limiting example. It will be noted that the texture 3 is schematically illustrated in a groove 21 on the bottom 213 and on the transition zones 215 in a non-limiting example, in zoomed view. It will also be noted that the wall 214 is here represented as extending perpendicular to the bottom 213 of the groove. As a variant, this wall 214 may have an angle different from 90 ° with respect to the bottom 213. [39] In a first nonlimiting embodiment illustrated in FIG. 3, all or some of the grooves 21 comprise a texture 3 extending only on the groove bottom 213 and on at least part of the transition zones 215 associated with this groove bottom, said texture 3 being in contrast with the remainder of the tire 2. By at least part of a transition zone 215, is meant that the texture extends over at least 25% of the surface of this transition zone 215. The texture 3 does not extend on the walls 214. It is thus absent from the walls 214. This first mode hides the lines level level found in the bottom 213 and the transition zones 215 of the grooves 21. These level lines on the bottom are indeed particularly visible for an observer of the tire. [40] In a second non-limiting embodiment illustrated in Figure 2, all or part of the grooves 21 comprise a texture 3 extending over the entire interior of the grooves 21, namely on the bottom 213 groove, on the transition zones 215 associated with this groove bottom and on the walls 214 of the groove, said texture 3 in contrast with the rest of the tire 2. [41] The texture 3 thus makes it possible to hide the level lines. Moreover, the fact that the texture 3 is disposed in the grooves 21 makes it possible to offer greater durability to said texture 3. In fact, the impact of mechanical aggressions on the texture, such as friction with pebbles, is low. [42] According to a first non-limiting embodiment of the texture 3, the texture 3 comprises a plurality of protruding elements with respect to the surface of the groove. The effect of these protruding elements is to "trap" a large quantity of the incident light rays that meet the texture 3. In this first embodiment, the texture 3 (called "velvet") makes it possible to obtain a visual type "Velvet" because the protruding elements absorb the light and thus make the grooves 21 more black. By their structure and because of their "embedding" in the grooves 21, these protruding elements also make it possible to more easily evacuate the water, the mud and the dust out of the grooves 21. [43] According to a variant of non-limiting embodiment, at least 30% of the protruding elements of the texture 3 makes an angle α greater than 40 ° with respect to a tangent plane X to the surface of a groove 21 (surface of the bottom 213, surface of the zones of transition 215, surface of the walls 214) and at most 25% of the protruding elements of the texture makes an angle α less than 20 ° relative to the tangent plane X. On the zoomed portion of the texture 3 of Figure 2 are illustrated schematically the protruding elements, said tangent plane X and said angle a. It will be noted that the angle a is the angle between the tangent plane X and the side of the protruding elements. This variant applies for the protruding elements 6 and 7 described below. [44] Figure 4 illustrates the texture 3 according to a first non-limiting embodiment of the first embodiment. In this variant, all or part of the protruding elements are strands 6 distributed in the texture 3 in a density at least equal to one strand per square millimeter (mm 2), each strand having an average section S of between 0.003 mm 2 and 1 mm2. It should be noted that the average section of each strand corresponds to the average of sections S measured at regular intervals from the base of the strand. The strands 6 have a generally conical shape with a decreasing section in the Hb height of these strands. [45] Figure 5 illustrates the texture 3 according to a second non-limiting embodiment of the first embodiment. In this variant, all or part of the elements in protuberance are slats 7 substantially parallel to each other, the pitch P of the slats in the texture being between 0.1 mm and 0.5 mm, each slat 7 having an average width between 0.03 mm and 0.25 mm. It will be noted that the average width corresponds to the average of the widths 1 measured at regular intervals in the height H1 of the lamella, the height of each lamella being between 0.05 and 0.5 mm. [46] In another alternative embodiment, the texture comprises a combination of strands 6 and slats 7. [47] Figure 6 illustrates the texture 3 according to a third non-limiting embodiment of the first embodiment. In this variant, all or part of the protruding elements form parallelepipeds 8 of side C between 0.05 mm and 0.5 mm, of height Hp between 0.05 mm and 0.5 mm, the distance 15 Dp between two adjacent parallelepipeds 8 in the texture being between 0.05 mm and 0.5 mm. [48] In another alternative embodiment, the texture comprises a combination of the raised elements 6, 7 and 8, or 6 and 8, or 7 and 8 described above. [49] Figure 7 illustrates the texture 3 according to a fourth non-limiting embodiment of the first embodiment. In this variant, the protruding elements 9 have in the texture 3 shapes and distances between elements protruding variable. This variant makes it possible to improve the aesthetic rendering of the texture 3. [50] According to a second non-limiting embodiment of the texture 3, the texture 3 comprises a plurality of hollow elements 10 (also called holes) relative to each other. on the surface of the grooves 21 (bottom surface 213, surface of the transition zones 215, surface of the walls 214). The recessed elements 10 are composed of openings 11 on the surface of the grooves, and associated cavities 12 extending in the depth of the grooves. [51] Thus, the texture 3 has a plurality of openings 11 in the groove surface, said openings 11 being distributed in the texture 3 in a density at least equal to one aperture per square millimeter (mm 2) and having (on the groove surface) diameters Dt equivalent between 0.03 mm and 1.2 mm. [52] In one nonlimiting embodiment, the openings 11 occupy at least 30% of the texture 3.
    [0004] According to other nonlimiting embodiments, the openings 11 occupy at least 50% of the texture 3, or even more than 70%. It should be noted that the greater the degree of occupation of the openings on the texture, the better the masking of the level lines resulting from the molding process, and the better the contrast quality of this texture with respect to the rest of the tread. (especially with respect to the rolling surface). [53] The openings 11 extend in the depth of the grooves 21 to form cavities 12. [54] The effect of these cavities 12 is to "trap" a large amount of incident light rays that meet the texture 3. Indeed since the cavities 12 are recessed in the groove 21, the impact of the mechanical stresses on the texture, such as friction with pebbles, is lower than for protuberances. In this second embodiment, the texture 3 (called "velvet") makes it possible to obtain a visual "velvet" type because the cavities absorb the light and thus make the grooves 21 more black. The visual effect of the grooves is improved. [55] In a non-limiting embodiment, all or part of the cavities 12 has a depth of at least 0.1mm. In a non-limiting embodiment, all or part of the cavities 12 has a depth of between 0.2 mm and 0.6 mm. In this way, it is ensured that a large quantity of incident light rays which meets the texture 3 is trapped by said texture and, since the depth of the cavities is limited, it is also avoided to degrade the mechanical strength of the grooves 21 .
    [0005] FIG. 8 illustrates the texture 3 according to a first nonlimiting variant of this second embodiment. In this variant, all or part of the cavities 12 are in the form of cones which extend in the depth of the groove 21 and open on the surface of the groove 21 forming circular openings 11. The cavities 12 thus have a section which decreases in depth. In this way, it improves the contrast of the texture 3 and thus the groove 21 relative to the remainder of the tread 2. Note that in this embodiment, the openings 11 of the cavities 12 do not touch. The openings 11 are separated by intermediate zones 13. In addition, the openings 11 are evenly distributed over the surface of the groove 21 so that the distance d between each opening of the texture 3 is generally similar. [57] Figure 9 is a zoom on a cavity 12 of a hollow element 10 of the texture of Figure 8. In a non-limiting embodiment, all or part of the cavities has at least one wall 14 which, according to a sectional view, forms an angle p between 10 ° and 60 °, with respect to a direction Z perpendicular to the texture 3. [58] Whenever a light ray encounters a wall 14 of the cavity 12, it is reflected by said wall 14. The direction of reflection of the light beam depends on the initial direction of the light beam and the angle of inclination of the wall 14. Thus, depending on this initial direction and this angle of inclination, the light ray can be returned to another wall 14 of the cavity. Conversely, the light ray can be returned outside the cavity, for example directly to an observer. In the first case, the light ray "gets lost" in the cavity and it will no longer be perceptible by the eye of an observer. In the second case, the observer can perceive the light beam and the texture may then appear to be brighter and therefore less contrasted with the rest of the tread. By choosing a cavity 12 having at least one wall 14 which forms an angle p between 10 ° and 60 °, it is ensured that a large part of the light rays entering the cavity 12 will be absorbed by this cavity under the effect of multiple reflections inside the cavity. In this way, the contrast of the texture 3 (and in particular of the grooves 21) is improved relative to the rest of the tire (in particular with respect to the sidewall or with respect to the running surface), while maintaining the same degree of occupation of the cavities in the texture. In addition, with this inclination of the wall, the texture strength is generally improved, especially during repeated rubbing with pebbles. [59] Thus, the tread 2 described is adapted to integrate into a tire 1 of rubber material for a motor vehicle. By motor vehicle, we mean any type of motorized vehicle, such as cars or trucks. [60] The tire 1 thus comprises a tread 2, said tread 2 having a running surface 20 and a plurality of grooves 21, at least one groove having, in section, a generally undulating shape with parts of fully open grooves 210 on the running surface 20 and closed groove portions 211 in whole or in part on said rolling surface 20. The open groove portions 210 comprise a contrasting texture 3 in the tread, the texture 3 comprising a plurality of elements protuberant or hollow relative to the surface of the groove. [61] The invention is not limited to the examples described and shown and various modifications can be made without departing from its scope. [62] Thus, according to another non-limiting embodiment, the slats 7 of Figure 5 may be discontinuous. They have a flat part between them. In addition, they may have section differences between them. In addition, the slats may have curvatures or angles, especially in their length. They can also be of variable length. [63] Thus, according to another embodiment, the openings 11 may have the circular shape, square, or polygonal (for example hexagonal) and the corresponding cavities 12 in the form of cylinders, parallelepipeds, or polygons. With these two last structures (square or polygonal), it is possible to more easily organize the openings 11 relative to each other so as to limit the area of the intermediate zones 13 between these openings. With such forms of openings, it is possible to arrive more easily at substantial rates of occupancy of the openings. [64] Thus, the invention described has the following advantages in particular: the texture 3 makes it possible to mask the level lines in the grooves 21; the texture 3 (whether with elements in protuberance and / or with hollow elements) makes it possible at the same time to absorb the light and thus to give a black appearance to the grooves 21 with respect to the remainder of the strip 2. This improves the contrast of the grooves 21 relative to the remainder of the tread; The texture 3 makes it possible to obtain a visual at the grooves 21, of the "velvet" type, which brings an effect of contrast and depth in the grooves 21, so that they appear deeper in the eye of an observer.
    权利要求:
    Claims (9)
    [0001]
    REVENDICATIONS1. A tread (2) for a tire (1), said tread 5 having a tread surface (20) and a plurality of grooves (21), at least one groove having, in cross-section, a generally corrugated shape with parts of fully open grooves (210) on the running surface (20) and closed groove portions (211) wholly or partly on said running surface (20), characterized in that the open groove portions (210) comprise a contrasting texture (3) in the tread, the texture (3) having a plurality of protruding or recessed elements (6, 7, 8, 9, 10) with respect to the surface of the groove .
    [0002]
    2. Tread according to claim 1, characterized in that the texture (3) is absent from the closed groove portions (211). 15
    [0003]
    3. tread according to claim 2, characterized in that at least 30% of the protuberance elements (6,7) of the texture (3) makes an angle greater than 40 ° relative to a plane tangential to the surface of the groove (21) and in that at most 25% of the protuberance elements (6, 7) of the texture (3) make an angle α of less than 20 ° with respect to the tangent plane.
    [0004]
    4. tread according to one of claims 2 or 3, characterized in that all or part of the protruding elements are strands (6) distributed in the texture (3) at a density of at least one strand per millimeter square (mm 2), each strand having a mean section of between 0.003 mm 2 and 1 mm 2.
    [0005]
    5. tread according to any one of claims 2 to 4, characterized in that all or part of the protruding elements are lamellae (7) substantially parallel to each other, the pitch of the lamellae in the texture being at most 30 at 0.5 mm, each lamella having an average width of between 0.03 mm and 0.25 mm.
    [0006]
    6. tread according to any one of claims 2 to 5, characterized in that all or part of the protruding elements form parallelepipeds (8) side (C) between 0.05 mm and 0.5 mm, of height (H) between 0.05 mm and 0.5 mm, the distance between two adjacent parallelepipeds in the texture being between 0.05 mm and 0.5 mm.
    [0007]
    7. Tread according to any one of claims 2 to 6, characterized in that the protruding elements (9) have in the texture (3) forms and distances between elements protruding variable.
    [0008]
    Tread according to one of Claims 1 to 2, characterized in that the hollow elements (10) form openings (11) on the surface of the groove (21) and the texture (3) comprises a a plurality of openings (11), these openings being distributed in the texture (3) in a density at least equal to one opening per square millimeter (mm 2), these openings having equivalent diameters of between 0.03 mm and 1, 2 mm.
    [0009]
    Pneumatic tire (1) comprising a tread (2) according to any one of claims 1 to 8. 25
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    同族专利:
    公开号 | 公开日
    EP3116725A1|2017-01-18|
    CN106103141B|2018-12-11|
    CN106103141A|2016-11-09|
    WO2015135877A1|2015-09-17|
    JP2017507076A|2017-03-16|
    FR3018222B1|2017-09-01|
    EP3116725B1|2019-10-09|
    US20170066292A1|2017-03-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2004196145A|2002-12-19|2004-07-15|Yokohama Rubber Co Ltd:The|Pneumatic tire|
    US20110125465A1|2009-11-25|2011-05-26|Buresh Patrick J|Tread surface structures for mud evacuation|
    WO2011101495A1|2010-02-22|2011-08-25|Societe De Technologie Michelin|Device for protecting a groove in a tread|
    WO2012148406A1|2011-04-29|2012-11-01|Michelin Recherche Et Technique S.A.|Tire with tread having bridged areas with split contact faces within a lateral groove|WO2017072317A1|2015-10-29|2017-05-04|Compagnie Generale Des Etablissements Michelin|Tread with concealed cavities comprising a wear indicator having improved visibility|
    EP3332990A1|2016-12-12|2018-06-13|The Goodyear Tire & Rubber Company|Tire tread for a snow tire|JP3072921B2|1991-07-04|2000-08-07|住友ゴム工業株式会社|Pneumatic tire|
    DE10357627A1|2003-12-10|2005-07-07|Continental Ag|Method for producing tire molds for vehicle tires|
    FR2892336B1|2005-10-21|2009-10-09|Michelin Soc Tech|MARKING PROVIDES IMPROVED VISIBILITY AND MARKING METHOD.|
    FR2950565B1|2009-09-29|2012-08-31|Michelin Soc Tech|ROLLER BELT FOR IMPROVED RIGIDITY TIRES|
    FR2973286B1|2011-03-31|2013-08-16|Michelin Soc Tech|HIGH CONTRAST PNEUMATIC PATTERN|JP2019001217A|2017-06-12|2019-01-10|横浜ゴム株式会社|Pneumatic tire|
    JP2019104281A|2017-12-08|2019-06-27|株式会社ブリヂストン|tire|
    JP2019104282A|2017-12-08|2019-06-27|株式会社ブリヂストン|tire|
    法律状态:
    2016-03-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-23| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-29| ST| Notification of lapse|Effective date: 20191106 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451916A|FR3018222B1|2014-03-10|2014-03-10|TREAD BAND COMPRISING HIGH CONTRAST TEXTURE IN A GROOVE|FR1451916A| FR3018222B1|2014-03-10|2014-03-10|TREAD BAND COMPRISING HIGH CONTRAST TEXTURE IN A GROOVE|
    US15/123,083| US20170066292A1|2014-03-10|2015-03-09|Tread Comprising A Strong-Contrast Texture In A Groove|
    JP2016556302A| JP2017507076A|2014-03-10|2015-03-09|Tread with strong contrast texture in the groove|
    CN201580013032.8A| CN106103141B|2014-03-10|2015-03-09|It in the trench include the tyre surface of strong contrast texture|
    PCT/EP2015/054845| WO2015135877A1|2014-03-10|2015-03-09|Tread comprising a strong-contrast texture in a groove|
    EP15708242.1A| EP3116725B1|2014-03-10|2015-03-09|Tread comprising a strong-contrast texture in a groove|
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