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:
Sep. 06, 2011
Filed:
Dec. 01, 2008
Takashi Yamashita, Hyogo, JP;
Kazuhiro Goto, Hyogo, JP;
Kazuhiro Yoshida, Hyogo, JP;
Noriko Horikawa, Hyogo, JP;
Takashi Yamashita, Hyogo, JP;
Kazuhiro Goto, Hyogo, JP;
Kazuhiro Yoshida, Hyogo, JP;
Noriko Horikawa, Hyogo, JP;
Ushio Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An extra-high pressure discharge lamp, comprises an optical transparent light emitting section, sealing sections connected to the light emitting section, a pair of electrodes which face each other in the light emitting section, wherein one of the electrodes having a thick portion, a thin portion and an intermediate portion which is formed between the thick portion and the thin portion, wherein 0.15 mg/mmof mercury is enclosed in the light emitting portion, and wherein the number of crystal grains which exist on a cross section perpendicular to an axis of the one of the electrodes is three.