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:
Sep. 05, 1989
Filed:
May. 04, 1988
Applicant:
Inventors:
Martinus H Van De Weijer, Eindhoven, NL;
Joseph F Eijsermans, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313633 ; 313576 ; 313643 ; 313631 ;
Abstract
A high-pressure sodium discharge lamp provided with a solid electrode consisting mainly of tungsten plus a small quantity of rhenium, and free of alkaline earth metals. The addition of rhenium suppresses sodium attack which caused the tip end of the electrode to break off before the desired lamp life was reached.
Van De Weijer, Martinus. (1989). Rhenium-containing electrode for a high-pressure sodium discharge lamp (U.S. Patent No. 4864191). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4864191
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile