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. 16, 1999
Filed:
Dec. 09, 1997
Hirofumi Aoki, Saitama-ken, JP;
Shunji Araki, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A rubber composition which comprises natural rubber and diene synthetic rubbers and carbon black having a cetyltrimethylammonium bromide surface area, a dibutyl phthalate absorption amount, a most frequent value of aggregate diameter distribution, a ratio of a half value width of aggregate diameter distribution to a most frequent value of aggregate diameter distribution, a ratio of a nitrogen adsorption specific surface area to an iodine adsorption amount, and a ratio of a cetyltrimethylammonium bromide surface area to an iodine adsorption amount in respective specific ranges, and a pneumatic tire prepared by using the rubber composition for a tread. The rubber composition and the pneumatic tire are excellent in all of abrasion resistance, resistance to tearing, and low heat buildup.