The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 1997
Filed:
May. 01, 1995
Shingo Midorikawa, Hiratsuka, JP;
Kinya Kawakami, Hiratsuka, JP;
Yasushi Kikuchi, Hiratsuka, JP;
Motoji Fujita, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
The cap tread portion composed of a rubber composition having a tan.delta. (0.degree. C.) of at least 0.45 and a tan.delta. (60.degree. C.) of at least 0.25 comprising (i) a p-phenylenediamine type antioxidant, 2,2,4-trimethyl-1,2-dihydroquinoline etc, and carbon black having a nitrogen specific surface area of at least 70 m.sup.2 /g and a 24M4DBP of at least 80 ml/100 g or (ii) a p-phenylenediamine based antioxidant, a 2,2,4-trimethyl-1,2-dihydroquinoline or other polymer mixture of a specific polymer content, and carbon black having a nitrogen specific surface area of at least 70 m.sup.2 /g and a 24M4DBP of at least 80 ml/100 g, blended with a rubber.