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. 28, 2001
Filed:
Apr. 20, 1999
Applicant:
Inventors:
Hirokazu Tachibana, Osaka, JP;
Yoshinori Otaka, Osaka, JP;
Toyokazu Amano, Kyoto, JP;
Fumihiro Inagaki, Kyoto, JP;
Assignee:
Matsushita Electronics Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 3/100 ;
U.S. Cl.
CPC ...
H01J 3/100 ;
Abstract
A fluorescent lamp highly capable of inhibiting penetration of mercury or ultraviolet ray, in which blackening of a glass tube is prevented, and which displays excellent luminous flux maintenance. The lamp has a protective film mainly composed of substantially spherical metal oxide particles, which is formed between a glass tube and a fluorescent layer on the inner surface of the glass tube.