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:
Jul. 06, 1993
Filed:
Oct. 30, 1991
Applicant:
Inventor:
Shinji Misono, Gotenba, JP;
Assignee:
Tokai Carbon Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524496 ; 524495 ; 423445 ;
Abstract
A rubber composition comprising 100 parts by weight of a rubber component which consists of a natural rubber alone or a blend of a natural rubber with a dienic synthetic rubber and from 35 to 100 parts by weight of a carbon black compounded into the rubber. The carbon black has a nitrogen adsorption specific surface area (N.sub.2 SA) of 100 to 160 m.sup.2 /g and also a true specific gravity and a mode diameter of intraaggregate pore (Dp) which satisfy, respectively, the relations