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:
Jun. 13, 1978
Filed:
Mar. 16, 1977
Applicant:
Inventors:
Haruo Yamazaki, Moriyama, JA;
Hidezoh Akutsu, Hyogo, JA;
Assignee:
Matsushita Electronics Corporation, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
313493 ; 313220 ; 313224 ; 313226 ;
Abstract
A spherical or dome-shaped fluorescent lamp comprises a spherical or dome-shaped outer bulb and an inner bulb formed with a zig-zag groove over the outer surface thereof and inserted into the outer bulb to define a zig-zag discharge path therebetween. The discharge path has a substantially circular on elliptical cross sectional configuration and is filled with a discharge medium consisting of mercury and a rare gas or rare gas mixture for emitting ultraviolet radiation. A phosphor coating is applied to the inner wall surface of the outer bulb and/or the outer surface of the inner bulb.