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. 25, 2003
Filed:
May. 30, 2001
Shinji Taniguchi, Kyoto, JP;
Yasaburo Takeji, Kyoto, JP;
Kuniaki Nakano, Kyoto, JP;
Jiro Honda, Kyoto, JP;
Shigeyuki Mori, Kyoto, JP;
Japan Storage Battery Co., Ltd., Kyoto, JP;
Abstract
A discharge lamp comprises an arc tube made of a translucent ceramic dosed with a metallic halide. The discharge is conducted between electrodes disposed in the arc tube The arc tube comprises a main tube body having a large diameter portion A and a small diameter portion C, and a narrow tube airtightly fixed to the small diameter portion C while penetrating the small diameter portion C. In the discharge lamp, supposing that L (mm) is the length of a protrusion from the main tube body of the narrow tube portion and P (W) is the rated power of the discharge lamp, L and P satisfy the relationship (P+268.75)/31.25≦L≦(P+456.25)/31.25 and 200≦P≦450.