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. 16, 1993
Filed:
Oct. 25, 1991
Applicant:
Inventors:
Lionel Vandenbulcke, Saint Jean le Blanc, FR;
Stephane Goujard, Merignac, FR;
Henri Tawil, Le Bouscat, FR;
Jean-Claude Cavalier, Le Pain Medoc, FR;
Assignee:
Societe Europeenne de Propulsion, Suresness, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428336 ; 428378 ; 428380 ; 428384 ; 428403 ; 428404 ; 428408 ; 428698 ; 428704 ; 252502 ; 252504 ; 252506 ;
Abstract
A composite material containing carbon is protected against oxidation by forming, on the composite material, an inner layer, an intermediate layer containing boron or a boron compound, and an outer layer of silicon carbide. The inner layer formed on the composite material before the intermediate layer is formed, is made of a refractory carbide that does not contain boron and that is at least 60 microns thick, said inner layer insulating the intermediate layer from the carbon contained in the composite material.