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. 29, 2002
Filed:
Apr. 28, 2000
Eiji Nakamura, Tokyo, JP;
Toshiyuki Ishikuro, Saitama-ken, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A rubber composition includes a rubber component, a polyethylene short fiber, and a blowing agent. The rubber component has a polybutadiene and at least one natural rubber or synthetic diene rubber. The polybutadiene has a weight-average molecular weight of 5,000 to 30,000 obtained as a weight-average molecular weight corresponding to polystyrene and further has a content of a cis-1,4 structure of 60 to 98%. The rubber component is 6% by weight or more polybutadiene. The short fiber has an average length of 10 mm or shorter. A pneumatic tire includes the rubber composition and exhibits excellent braking ability on ice, excellent braking ability on wet road surfaces, and improved driving stability in the early driving period. The pneumatic tire exhibits remarkable improvement in braking ability on ice even after a base rubber is exposed by abrasion of a tread rubber.