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. 19, 2008
Filed:
May. 27, 2004
Akiko Nakanishi, Takatsuki, JP;
Kohhei Iwase, Takatsuki, JP;
Kenji Nakano, Kyoto, JP;
Kenji Itaya, Takatsuki, JP;
Seidou Tani, Yawata, JP;
Noriyuki Uchida, Hirakata, JP;
Akiko Nakanishi, Takatsuki, JP;
Kohhei Iwase, Takatsuki, JP;
Kenji Nakano, Kyoto, JP;
Kenji Itaya, Takatsuki, JP;
Seidou Tani, Yawata, JP;
Noriyuki Uchida, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An arc tube includes an arc tube body and a pair of electrodes. The arc tube body is formed from a glass tube which is double-spirally wound from a middle portion to both ends around a spiral axis. The pair of electrodes are sealed at both ends of the arc tube body. Mercury is enclosed in the arc tube substantially in a single form. Each of the electrodes includes a multiple-coiled filament which is wound substantially one turn in a last coiling stage.