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. 04, 1988
Filed:
Apr. 10, 1987
Applicant:
Inventors:
Masaaki Morimoto, Sakado, JP;
Seiichiro Iwafune, Hoya, JP;
Assignees:
Bridgestone Corporation, Tokyo, JP;
Shikoku Chemicals Corp., Kagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08C / ;
U.S. Cl.
CPC ...
5253331 ; 525354 ;
Abstract
A rubber composition contains granules of two-layer structure composed of insoluble sulfur powder treated with .alpha.-methylstyrene and a process oil as a vulcanizing agent. In this case, the content of process oil in the inner layer portion of the granule is larger than that in the outer layer portion thereof.