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:
Nov. 16, 1976
Filed:
Feb. 26, 1975
Dirk Barneveld, Eindhoven, NL;
Gerardus Antonius Vermeulen, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Method of manufacturing a display screen for a shadow mask tube by projecting a negative image of the shadow mask on support provided with a first photosensitive layer, removing the unexposed regions by means of a solvent, depositing a second photosensitive layer containing a luminescent material of one color dissolved in a solution which becomes insoluble by exposure but is not attacked by an etchant which affects the first layer, exposing the second layer, and removing the exposed regions of the first layer together with superposed portions of the second layer, by the etchant.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile