US Patent No: 5,494,958

Number of patents in Portfolio can not be more than 2000

High modulus low hysteresis rubber compound for pneumatic tires

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Importance

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Abstract

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A sulfur-vulcanizable rubber compound, being devoid of peroxide components, having high modulus and low hysteresis properties subsequent to vulcanization. Such compounds comprise from about 25 to 55 parts by weight of polyisoprene; and from about 75 to 45 parts by weight of a diene polymer selected from the group consisting of homopolymers of conjugated diene monomers and copolymers thereof with monoolefin monomers and EPDM terpolymers to total 100 parts by weight of rubber polymer; from about 50 to 70 parts by weight of a reinforcing filler, per 100 parts by weight wherein at least a portion of at least one of the rubber polymers is grafted with a polymeric metal salt of an .alpha., .beta.-ethylenically unsaturated carboxylic acid to form an uncured graft rubber copolymer and at least about 4 parts by weight of a curative selected from the group consisting of sulfur and sulfur donors, per 100 parts by weight of rubber. Pneumatic tires and structural components therefor are manufactured from rubber compounds having high modulus, low hysteresis and high compressive flex fatigue and provide run flat operation.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BRIDGESTONE CORPORATIONTOKYO3628

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Freeman, Roy M Akron, OH 3 98
Hergenrother, William L Akron, OH 257 1394
Ravagnani, Frederick J Uniontown, OH 14 146

Cited Art Landscape

Patent Info (Count) # Cites Year
 
BRIDGESTONE CORPORATION (5)
4,261,405 Safety pneumatic tire with tire maximum width to rim width ratio from 1.0 to 1.3 32 1979
4,265,288 Pneumatic safety tire with excellent long-running ability after puncture employing rubber having specifically defined properties for sidewall inserts and tread 17 1979
4,779,658 Pneumatic safety tire 26 1987
4,824,899 Rubber compositions for bead filler 12 1987
4,917,164 Pneumatic safety tire 29 1988
 
BRIDGESTONE/FIRESTONE NORTH AMERICAN TIRE, LLC (5)
4,465,829 Elastomeric composition comprising natural rubber for use under dynamic, high heat conditions 8 1983
4,500,466 Method for preparing a zinc dimethacrylate powder having a specific surface area range 27 1983
4,529,770 Vulcanizable polymeric compositions containing zinc dimethacrylate and fillers 14 1983
4,495,326 Rubber compounds containing zinc dimethacrylate 15 1984
4,929,684 Stiff sidewalls for pneumatic tires 12 1988
 
SUMITOMO RUBBER INDUSTRIES, LTD. (3)
5,115,021 Pneumatic tires 5 1989
5,145,536 Radial tire which runs safe after a loss of tire pressure 19 1991
5,151,139 Heavy duty radial tire having durable buttress portion 5 1991
 
The Yokohama Rubber Co., Ltd. (3)
4,202,393 Run flat tire for motorcycles 38 1978
5,131,445 Run-flat pneumatic radial tire 19 1990
5,158,627 Run flat pneumatic radial tire 17 1991
 
BRIDGESTONE/FIRESTONE RESEARCH, INC. (1)
4,203,481 Pneumatic tire, rim and combination thereof 27 1978
 
CONTINENTAL AKTIENGESELLSCHAFT (1)
4,287,929 Pneumatic vehicle tire 17 1980
 
Pneumatiques Caoutchouc Manufacture et Plastiques Kleber-Colombes (1)
4,287,924 Safety tire with sidewall support members having two parts with different flexibilities 49 1979
 
The Toyo Rubber Industry Co., Ltd. (1)
4,365,659 Pneumatic safety tire 41 1977
 
TOYO TIRE & RUBBER CO., LTD. (1)
5,088,537 Radial tire with a sidewall having a three-layer structure 12 1989

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
ACUSHNET COMPANY (20)
6,162,135 Low compression, resilient golf balls including an inorganic sulfide catalyst and methods for making the same 95 1999
6,291,592 Low compression, resilient golf balls including aromatic catalyst and method for making same 78 1999
6,465,578 Low compression, resilient golf balls including an organosulfur catalyst and method for making same 52 1999
6,458,895 Low compression, resilient golf balls including elemental catalyst and method for making same 38 1999
6,417,278 Low compression, resilient golf balls including a cis-to-trans catalyst and method for making same 23 2000
6,749,789 Method of forming a multilayer golf ball with a thin thermoset outer layer 1 2000
6,913,547 Thin-layer-covered multilayer golf ball 8 2001
6,849,006 Thin, thermoset, polyurethane-covered golf ball with a dual core 8 2002
6,634,964 Initial velocity dual core golf ball 1 2002
6,818,705 Thin-layer-covered golf ball with improved velocity 25 2002
6,960,630 Thin, thermoset, polyurethane-covered golf ball with a dual core 1 2003
7,041,743 Thin-layer-covered golf ball with improved velocity 3 2003
7,001,954 Thin-layer-covered golf ball with improved velocity 2 2003
6,992,142 Thin-layer-covered golf ball with improved velocity 2 2003
7,314,587 Method of forming a multilayer golf ball with a thin thermoset outer layer 1 2004
7,105,610 Thin-layer-covered golf ball with improved velocity 1 2004
7,446,150 Low compression, resilient golf balls with rubber core 2 2005
7,271,222 Thin-layer-covered golf ball with improved velocity 2 2006
7,531,603 Thin-layer-covered golf ball with improved velocity 1 2007
8,093,337 Thin-layer-covered golf ball with improved velocity 0 2009
 
BRIDGESTONE CORPORATION (3)
6,009,923 Pneumatic tire with air retention innerliner ply 2 1997
7,723,440 Functionalized polymers and improved vulcanizates therefrom 1 2003
8,207,275 Functionalized polymers and improved vulcanizates therefrom 0 2010
 
BRIDGESTONE/FIRESTONE NORTH AMERICAN TIRE, LLC (2)
5,769,980 Pneumatic tire with sidewall inserts having specified extension underneath the belt package 9 1996
7,255,146 Apparatus and method of enhancing run-flat travel for pneumatic tires 2 2004
 
JPMORGAN CHASE BANK, N.A. (1)
D413087 All terrain vehicle tread 4 1998
 
The Goodyear Tire & Rubber Company (1)
8,672,009 Pneumatic tire with dual layer sidewall 0 2008
 
THE KOREA DEVELOPMENT BANK (1)
6,508,968 Low compression, resilient golf balls including an inorganic sulfide catalyst and methods for making the same 11 2000