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:
Dec. 20, 2005
Filed:
Jul. 23, 2003
Applicants:
Kenji Yamamoto, Takatsuki, JP;
Kenji Hirai, Sakai, JP;
Shingo Matsuda, Takashima-gun, JP;
Shinichiro Ishitsuka, Osaka, JP;
Inventors:
Kenji Yamamoto, Takatsuki, JP;
Kenji Hirai, Sakai, JP;
Shingo Matsuda, Takashima-gun, JP;
Shinichiro Ishitsuka, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J061/35 ; H01J061/42 ; H01J065/04 ;
U.S. Cl.
CPC ...
Abstract
An object of the present invention is to provide a fluorescent lamp including: a hermetically sealed lamp vessel; and a phosphor layer attached to a part of an inner surface of the lamp vessel, where a thickness of the phosphor layer near an edge thereof gradually and smoothly decreases towards the edge.