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. 23, 1993
Filed:
Oct. 07, 1991
Applicant:
Inventors:
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524496 ; 524495 ; 524847 ;
Abstract
A rubber composition comprises natural rubber and/or a diene based synthetic rubber, and carbon black. The carbon black has characteristics that a line-width .DELTA.H (mT) in an electron spin resonance (ESR) satisfies .DELTA.H(mT).gtoreq..sub.e 0.11T-7.56+5 in which T is a colored transmittance (%) falling in a range of 100-60%, and an N.sub.2 SA value of the carbon black is not less than 114 m.sup.2 /g to 250 m.sup.2 g.