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:
Apr. 16, 2002
Filed:
Mar. 08, 2000
Richard C. Marlor, Beverly, MA (US);
Karin Naumann, Ober-Olm, DE;
Franz Ott, Mitterteich, DE;
Ottmar Becker, Langen, DE;
Other;
Abstract
A long life, halogen cycle, incandescent lamp ( ) for operation in excess of 85 volts. The lamp comprises a transparent glass envelope ( ) having sealed therewithin a tungsten filament ( ); a pair of electrical lead-ins ( ) connecting the filament and extending exteriorly of the envelope for connection to a supply voltage greater than 100 V; and a fill gas within the envelope, including a halogen, at a pressure of at least three atmospheres. The envelope is constructed of a five component alkaline earth aluminosilicate glass having a composition consisting essentially of, in weight percent from >58 to about 64% SiO , from about 14 to about 17% Al O ; from 0 to about 1% B O , from 1 to about 6% MgO, from about 6 to about 12% CaO, from about 7 to about 17% BaO and from 0 to about 1.5% ZrO .