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:
May. 18, 1976
Filed:
Feb. 14, 1974
Alexander Gray Jack, Eindhoven, NL;
Wiggert Kroontje, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A high pressure mercury vapour discharge lamp having a discharge vessel provided with electrodes between which the discharge is maintained during operation and comprising a quantity of rare gas as a starting gas and furthermore between 0.5 and 25 mg of mercury and between 1 and 20 .mu.g mol of at least one of the halides of tin (with the exception of fluoride) per cubic cm of contents of the discharge vessel. To decrease the colour temperature of the radiation emitted by the lamp the discharge vessel is furthermore provided with at least one of the halides of lithium (with the exception of fluoride), while up to a maximum of 50 mol % of lithium halide may be replaced by sodium halide.