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:
Dec. 10, 1991
Filed:
May. 09, 1990
Applicant:
Inventors:
John W Pugh, Gates Mills, OH (US);
Donald L Bly, Chagrin Falls, OH (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01K / ;
U.S. Cl.
CPC ...
313341 ; 313578 ;
Abstract
Improved tungsten coil filaments having good sag resistance and useful in double ended, high intensity and energy efficient tungsten halogen lamps having an IR reflecting filter on the filament chamber. These coil filaments have a microstructure which is a large, elongated and interlocking grain structure produced by a high temperature heat treatment process.