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:
Aug. 20, 2002
Filed:
Apr. 18, 2000
Masanori Sugihara, Himeji, JP;
Naohisa Ikeda, Himeji, JP;
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
A short-arc discharge lamp ( ) including a light-emitting tube ( ) having at least 15 mg/cc of mercury sealed therein, an anode ( ) and cathode ( ) facing each other and disposed within the light-emitting tube ( ), and a heat-release layer ( ) covering a substantial portion of an outer surface of the cathode ( ) so that when the short-arc discharge lamp ( ) is provided with electricity having a current value of at least 50 A, an inter-electrode power value defined by a ratio Y/X is at least 500 W/mm, X being defined as a distance in millimeters between the anode ( ) and the cathode ( ), and Y being defined as an input power in Watts provided to the short-arc discharge lamp ( ).