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:
Dec. 23, 2008
Filed:
Jul. 22, 2004
Atsushi Utsubo, Toyonaka, JP;
Hiroshi Nohara, Nishinomiya, JP;
Yukiya Kanazawa, Osaka, JP;
Yoshiharu Nishiura, Otsu, JP;
Kiyoshi Takahashi, Kyotanabe, JP;
Makoto Kai, Katano, JP;
Makoto Horiuchi, Sakurai, JP;
Atsushi Utsubo, Toyonaka, JP;
Hiroshi Nohara, Nishinomiya, JP;
Yukiya Kanazawa, Osaka, JP;
Yoshiharu Nishiura, Otsu, JP;
Kiyoshi Takahashi, Kyotanabe, JP;
Makoto Kai, Katano, JP;
Makoto Horiuchi, Sakurai, JP;
Panasonic Corporation, Kadoma, JP;
Abstract
A metal halide lamp of the present invention has an arc tube formed of ceramic and a pair of opposing electrodes. This lamp includes a Pr (praseodymium) halide, a Na (sodium) halide, and a Ca (calcium) halide enclosed within the arc tube. The Pr halide content Hp [mol], the Na halide content Hn [mol], and the Ca halide content Hc [mol] satisfy the relationships of 0.4≦Hc/Hp≦15.0 and 3.0≦Hn/Hp≦25.0.