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:
Feb. 25, 1992
Filed:
Dec. 21, 1989
Applicant:
Inventor:
Minoru Takabatake, Kamisumachi, JP;
Assignee:
Petoca Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423445 ; 423449 ; 264 291 ; 264 295 ; 264 453 ;
Abstract
A porous carbon-carbon composite having a porosity of 25-65%, higher strength and higher uniformity can be obtained by using carbon fibers having a fiber diameter of 2.5-32 micron and a fiber length of not longer than 2 mm in an amount of 60% by weight or more.