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:
Oct. 21, 1997
Filed:
Nov. 02, 1995
Tetsuji Kawazura, Hiratuska, JP;
Hiroyuki Kaido, Hiratuska, JP;
Kouichi Ikai, Hiratuska, JP;
Fumito Yatsuyanagi, Hiratuska, JP;
Masayuki Kawazoe, Hiratuska, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
A rubber composition containing a cross-linkable rubber component and a carbon black having silica adhered to the surface thereof and a silica surface-treated carbon black suitable for use in tire tread where the surface-treated carbon black has a nitrogen specific surface area (N.sub.2 SA) of 20 to 300 m.sup.2 /g, a ratio IA.sub.o /IA.sub.f of the adsorption amount of iodine (IA.sub.o) and the adsorption amount of iodine after treatment by hydrogen fluoride (IA.sub.f) of at least 0.30 but less than 1.0, and a ratio IA.sub.e /IA.sub.ef of the adsorption amount of iodine after extraction from a rubber compound (IA.sub.e) and the value of the same after treatment by hydrogen fluoride (IA.sub.ef) of at least 0.30 but less than 1.0.