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. 10, 2004
Filed:
Sep. 06, 2002
Loïc Rousseau, St. Aubin de Medoc, FR;
Jean-Christophe Pasquet, Bordeaux, FR;
Samuel Bernard, Villeurbanne, FR;
Marie-Paule Berthet, Lyons, FR;
Jean Bouix, Lyons, FR;
David Cornu, Lyons, FR;
Philippe Mielé, Lyons, FR;
Bérangère Toury, Villeurbanne, FR;
Pascaline Toutois, Lyons, FR;
Christiane Vincent, Lyons, FR;
Eads Launch Vehicles, Paris, FR;
Abstract
The invention concerns a method for making boron nitride fibers by drawing a polymer precursor and treating with ceramics the polymer fibers obtained by drawing. The invention is characterized in that the precursor polymer is obtained by thermal polymerization of a borazine of formula (I) wherein: R , R , R and R , identical or different, represent an alkyl, cycloalkyl or aryl group; and R represents a hydrogen atom or an alkyl, cycloalkyl or aryl group.