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:
Jul. 29, 1986
Filed:
Dec. 17, 1984
Applicant:
Inventors:
Deborah P Partlow, Pittsburgh, PA (US);
Shih-Ming Ho, Pittsburgh, PA (US);
Assignee:
North American Philips Lighting Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
75235 ; 75228 ; 75232 ; 1481261 ; 148127 ; 419-6 ; 419 19 ; 419 30 ; 419 39 ; 419 57 ; 419 66 ; 428565 ; 428615 ; 428621 ; 428649 ; 428651 ; 428689 ;
Abstract
Composite cermets having a central core of a first cermet composition and one or more surrounding layers of different cermet compositions are formed by a multi-step pressing operation, followed by sintering. A tungsten/alumina or molybdenum/alumina composite cermet is useful as an end closure for alumina arc tubes of metal halide discharge lamps.