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:
Jan. 18, 2005
Filed:
Jul. 06, 2000
Makoto Horiuchi, Nara, JP;
Makoto Kai, Osaka, JP;
Mamoru Takeda, Kyoto, JP;
Tsuyoshi Ichibakase, Osaka, JP;
Tomoyuki Seki, Osaka, JP;
Yoshiki Kitahara, Osaka, JP;
Toshio Mori, Kyoto, JP;
Yasuo Takeuchi, Osaka, JP;
Makoto Horiuchi, Nara, JP;
Makoto Kai, Osaka, JP;
Mamoru Takeda, Kyoto, JP;
Tsuyoshi Ichibakase, Osaka, JP;
Tomoyuki Seki, Osaka, JP;
Yoshiki Kitahara, Osaka, JP;
Toshio Mori, Kyoto, JP;
Yasuo Takeuchi, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention provides a high-pressure discharge lampincluding a luminous bulbenclosing at least a rare gas and halogen in the bulb and made substantially of quartz glass; and an electrodemade substantially of tungsten and disposed in the luminous bulb. The mole number of the halogen is larger than the sum of the total mole number of metal elements (except the tungsten element and the mercury element) that have the property of bonding to the halogen and are present in the luminous bulband the mole number of the tungsten present in the luminous bulb by evaporation from the electrodeduring lamp operation.