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:
Feb. 28, 1989
Filed:
Feb. 04, 1986
Park French, Aurora, OH (US);
Mary B Gotti, Macedonia, OH (US);
John J Karikas, Shelby, OH (US);
Gilbert H Reiling, Chardon, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A metal halide discharge lamp includes an arc tube design having a particular end shape which allows control of the temperature distribution within the arc tube, so that sensitivity of the arc tube performance to orientation is reduced and concentration of the metallic halide components in the arc region is maintained relatively constant. The shaping of the arc tube ends and the use of a low thermal emissivity coating on the arc tube allows maintenance of the metallic halide in the vapor state at a constant level to promote better lumen maintenance and color rendering in a metal halide discharge lamp.