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:
Nov. 02, 1993
Filed:
Oct. 15, 1990
Genevieve S Lum, Clinton, LA (US);
Conrad J Langlois, Jr, New Roads, LA (US);
Ethyl Corporation, Richmond, VA (US);
Abstract
Preceramic compositions which have particular utility in providing protective ceramic coatings on normally oxidizable materials, such as carbon/silicon carbide and other carbon-containing composites and other materials, are obtained by dispersing solid particles comprising aluminum nitride particles in an organic solvent solution of an organoborosilazane polymer obtainable by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysilazane in an organic solvent. Ceramic coatings derived from the dispersions may be overcoated with ceramics derived from other preceramic polysilazane compositions to provide even greater protection to the substrates.