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. 30, 1983
Filed:
Feb. 02, 1981
Gustaaf A Wesselink, Eindhoven, NL;
Hendrik Roelofs, Eindhoven, NL;
Cornelis H Van Bommel, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Low-pressure sodium vapor discharge lamp comprising a hollow inner member surrounded by an outer member, the wall of at least one of the members having grooves and the members of that portion, located between the grooves, extending to or to near the wall of the other member and a discharge space being formed wherein a discharge path, folded by means of the grooves, is present, the portions located between the grooves and facing the wall of the other member and extending to or to near the wall of the other member being provided with intervening portions extending in parallel with that wall.