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. 22, 1978
Filed:
Mar. 14, 1977
Applicant:
Inventors:
Yoshiaki Watarai, Takatsuki, JP;
Haruo Yamazaki, Moriyama, JP;
Naoki Saito, Takatsuki, JP;
Masayuki Yamaguchi, Takatsuki, JP;
Takio Okamoto, Kusatsu, JP;
Hidezo Akutsu, Kobe, JP;
Assignee:
Matsushita Electronics Corporation, Kadoma, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313112 ; 313113 ; 313229 ; 313489 ;
Abstract
A high pressure sodium vapor discharge lamp comprises an alumina tube envelope containing therein sodium, inert starting gas, buffer gas source of mercury or cadmium and discharge electrodes sealed in the envelope, inner diameter d (in mm) of said tube envelope and an average potential gradient E in volt/cm having the relation