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:
Jan. 01, 1985
Filed:
Jun. 24, 1982
Applicant:
Inventor:
Daniel A Larson, Cedar Grove, NJ (US);
Assignee:
North American Philips Lighting Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315 60 ; 315 59 ; 315 61 ; 315236 ; 315352 ;
Abstract
A high intensity discharge lamp, for example a high pressure sodium or sodium halide lamp, which utilizes a refractory metal spiral with positive electric potential applied to it positioned around the arc tube to aid in starting and inhibit sodium migration through the arc tube during operation.
Larson, Daniel. (1985). High pressure electric discharge lamp employing a metal spiral with (U.S. Patent No. 4491766). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4491766
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile