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. 05, 1996
Filed:
Oct. 19, 1993
Applicant:
Inventors:
Yann LePetitcorps, Leognan, FR;
Robert A Shatwell, Farnham, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
427249 ; 4272481 ; 427255 ; 4272557 ; 4272552 ;
Abstract
A ceramic filament comprising a tungsten core and an outer layer of silicon carbide, the tungsten core and the outer layer being separated by an intermediate layer of titanium carbide. Also claimed is a process for the deposition of a titanium carbide coating on a tungsten filament which comprises heating the filament and passing the heated filament through a deposition chamber containing gases which on contact with the hot filament deposit the coating, the gases comprising a hydrocarbon and a titanium halogenated compound, said titanium halogenated compound contacting the tungsten filament before the hydrocarbon.