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. 15, 1988
Filed:
Mar. 04, 1988
Applicant:
Inventors:
Masahiko Mito, Aichi, JP;
Kiyonari Nakai, Aichi, JP;
Assignee:
Tokai Carbon Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C08K / ;
U.S. Cl.
CPC ...
106472 ; 423450 ; 524496 ;
Abstract
A carbon black for blending in rubber is disclosed, which has a BET specific surface area (N.sub.2 SA) within a range of 65 to 84 m.sup.2 /g, an a value to be obtained according to the following calculation formula, of at least 270 and a ratio of the BET specific surface area (N.sub.2 SA) to the iodine adsorption number (IA), N.sub.2 SA/AI, within a range of 1.10 to 1.35: