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. 31, 1979
Filed:
Oct. 26, 1977
Applicant:
Inventor:
Ewald Wurster, Grunwald, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01K / ; H01K / ;
U.S. Cl.
CPC ...
313221 ; 313222 ;
Abstract
An incandescent lamp having a hard glass envelope, a tungsten filament, and an inert gas fill containing a halogen or halide additive. The hard glass envelope contains substantially no alkali or carbon monoxide and is preferably devoid of these materials. The hard glass contains less than 0.03% by weight of water and less than 0.1 .mu. liter/g carbon dioxide dissolved therein.