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:
May. 25, 1976
Filed:
Nov. 21, 1974
Jan Man in'T Veld, Eindhoven, NL;
Adrianus Antonius Hurx, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a method of manufacturing a torus-shaped lamp envalope in which a straight tube is softened by heating and is then bent in a vertical plane around a bending mould and is again cooled after which the cooperation of the still slightly soft tube with the bending mould is interrupted as soon as the tube is supported by a supporting member. The invention further relates to a fluorescent lamp having a lamp envelope thus shaped, as well as a device for carrying out the method.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile