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. 24, 1991
Filed:
Feb. 14, 1990
Applicant:
Inventors:
Akira Taya, Kawasaki, JP;
Keiji Hatakeyama, Yokohama, JP;
Kanehiro Saito, Chiba, JP;
Mitsumasa Saito, Narashino, JP;
Kazuhiko Osada, Narashino, JP;
Assignees:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Sumitomo Cement Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313112 ; 313489 ; 313493 ; 313635 ; 4271262 ; 4271263 ;
Abstract
A film consisting of a fine powder of zinc oxide and titanium oxide and an inorganic binder is formed on the outer surface of a light source. The fine powder serves as an absorbent for ultraviolet radiation emitted from the light source. The film is formed on the outer surface by spraying a coating agent prepared by dispersing the above components in an organic solvent on the outer surface of the light source and heating and drying the coating agent.