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:
Jul. 24, 2001
Filed:
Sep. 16, 1999
Applicant:
Inventors:
Kiyoshi Takahashi, Neyagawa, JP;
Makoto Horiuchi, Sakurai, JP;
Mamoru Takeda, Soraku-gun, JP;
Takeshi Saito, Amagasaki, JP;
Hideaki Kiryu, Takatsuki, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 6/120 ;
U.S. Cl.
CPC ...
H01J 6/120 ;
Abstract
The present invention provides a mercury-free metal halide lamp with an increased lamp operating voltage and prolonged lamp life without enclosing mercury or excessively increasing an inner pressure of an arc tube. A lamp in accordance with the present invention contains, as a content of a fill material,, 0.04 mg of ScI,, 0.21 mg of NaI, 7 atm of Xe at room temperature, and 0.1 mg of YI,, which is an iodide of Y, Y having an ionization potential as a simple substance being 5 to 10 eV and a vapor pressure at a temperature of lamp operation being 10,or higher.