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. 09, 2002
Filed:
Nov. 29, 1999
Zsuzsa Auber, Budapest, HU;
László Balázs, Budapest, HU;
István Deme, Budapest, HU;
Gábor Sajó, Budapest, HU;
Judit Szigeti, Budapest, HU;
General Electric Company, Schenectady, NY (US);
Abstract
A low pressure mercury vapor discharge lamp is provided, said discharge lamp ( ) comprising an envelope ( ) formed from light-transmitting material and containing an ionizable gas fill ( ), mercury, and electrodes ( ) sealed in the envelope. The envelope ( ) is provided with a single layer coating ( ) on the internal surface thereof next to the discharge space. The coating ( ) contains halo-phosphate phosphor and 5-30 mass % aluminum oxide relative to the halo-phosphate phosphor, and the primary particle size of the aluminum oxide is smaller than 30 nanometers, the floc size of the aluminum oxide is smaller than 1 micrometer, and the void fraction of the total floc volume is at least 50%.