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:
Mar. 18, 2008
Filed:
Nov. 28, 2002
Kuniki Kino, Shinjuku-ku, JP;
Kohtaro Kirimura, Shinjuku-ku, JP;
Masahiro Hojo, Kodaira, JP;
Yuichi Ishino, Musashimurayama, JP;
Kuniki Kino, Shinjuku-ku, JP;
Kohtaro Kirimura, Shinjuku-ku, JP;
Masahiro Hojo, Kodaira, JP;
Yuichi Ishino, Musashimurayama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A powder rubber obtained by crushing a waste rubber comprising various kinds of rubbers is subjected to treatment of making unevenness on a surface thereof. A method in which a microorganism growing with a rubber being an only carbon source and powder rubber having an average particle diameter of 1 mm or less are added to a culture medium to cultivate the microorganism can be applied as treatment of making the unevenness. The powder rubber is decomposed by this method, and the surface area is increased, whereby a rubber composition which is excellent in abrasion resistance, fracture characteristics and crack growth resistance can be obtained. A WU-YS05 strain (Patent Microorganism Depository Center: Accession number: FERM P-18660) belonging to Pseudonocardiaceae is effective as the microorganism.