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. 17, 1978
Filed:
Sep. 29, 1975
Petrus Johannes Buysman, Eindhoven, NL;
Gerardus Antonius Vermeulen, Eindhoven, NL;
Cornelis Arie Bos, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method of forming apertures in a thin metal tape. Cavities having a depth of at least half of the tape thickness are first etched from one side. Etching is then carried out mainly from the other side until apertures having the desired profile have been formed. During etching the first-mentioned side, the said other side is covered with a foil of synthetic resin. Shadow mask for a color television display tube manufactured according to a similar method.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile