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:
Mar. 29, 2005
Filed:
Dec. 19, 2002
Toshihiko Ishigami, Kawasaki, JP;
Kiyoshi Saita, Yokosuka, JP;
Mikio Matsuda, Tokyo, JP;
Toshio Hiruta, Hiratsuka, JP;
Toshihiko Ishigami, Kawasaki, JP;
Kiyoshi Saita, Yokosuka, JP;
Mikio Matsuda, Tokyo, JP;
Toshio Hiruta, Hiratsuka, JP;
Harison Toshiba Lighting Corporation, Ehime-ken, JP;
Abstract
Disclosed is a metal halide discharge lamp which essentially permits disusing mercury. The metal halide discharge lamp comprises a refractory and transparent hermetic vessel, a pair of electrodes fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a first halide, a second halide and a rare gas, the first halide being a halide of a metal which achieves a desired light emission, the second halide having a relatively high vapor pressure, being at least one halide of a metal which is unlikely to emit a visible light compared with the metal of the first halide, and acting as a buffer gas.