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:
Aug. 30, 1983
Filed:
Mar. 05, 1981
Applicant:
Inventors:
Assignee:
Toho Belson Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C25F / ;
U.S. Cl.
CPC ...
204130 ; 428367 ;
Abstract
A method for producing carbon fibers exhibiting excellent adhesive properties to resins and having high strength and heat-oxidation resistance, comprising electrically treating high strength carbon fiber in an aqueous solution of a sulfuric acid salt under conditions such that the current density is from about 0.05 to 0.5 A/m.sup.2 and the product of current density, voltage, and processing time is from about 0.02 to 8 A-V-min/m.sup.2, while continuously moving the carbon fiber as an anode in the aqueous solution.