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. 17, 2012
Filed:
Feb. 11, 2009
Hiroyuki Takatsuka, Shizuoka, JP;
Masaya Shido, Shizuoka, JP;
Hiroyuki Takatsuka, Shizuoka, JP;
Masaya Shido, Shizuoka, JP;
Koito Manufacturing Co., Ltd, Tokyo, JP;
Abstract
There is provided a mercury-free arc tube for a discharge lamp unit. The mercury-free arc tube includes a plurality of electrodes and a sealed chamber including a metal halide and a starting rare gas enclosed in the sealed chamber. A clearness index value P·W/ρ is equal to or greater than about 800, where ρ denotes a density (mg/cm) of the enclosed metal halide, P denotes a pressure (atmospheres) of the enclosed starting rare gas, and W denotes a maximum input power (watts) input to the sealed chamber through the electrodes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile