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:
Jun. 18, 1991
Filed:
Mar. 16, 1989
Applicant:
Inventor:
Raymond C Loszewski, Windham, NH (US);
Assignee:
Avco Corporation, Providence, RI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; D02G / ;
U.S. Cl.
CPC ...
428368 ; 428367 ; 428373 ; 428375 ; 428391 ;
Abstract
The invention relates to a surface treatment for silicon carbide filaments. A carbon-rich silicon carbide layer or coating is formed over the silicon carbide surface. The ratio of silicon to carbon in the carbon-rich silicon carbide layer varies from 1 (stoichiometric) at the silicon carbide filament interface to about 0.43 (70% carbon, 30% silicon) at the exterior surface of the carbon-rich layer. A preferred method of making the carbon-rich silicon carbide layer is also presented.