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. 06, 1976
Filed:
Nov. 04, 1974
Peter H Rollason, Cayuga, NY (US);
GTE Sylvania Incorporated, Stamford, CT (US);
Abstract
The invention provides a temporary light attenuation coating modification of the apertures in a multi-apertured pattern member for utilization in selected steps of the procedure for fabricating a patterned color screen structure disposed on the interior surface of a cathode ray tube viewing panel. The modification is in the form of a dried coating of a water-soluble polyhydric secondary alcohol uniformly covering the apertured portion of the pattern member to effect a bridging meniscus of coating in each of the apertures. Dissolved in the coating vehicle is a homogeneous dispersion of a ultraviolet absorbing material. Each attenuating meniscus effects a differential or graded degree of uv absorption resultant of the inherent variation in thickness of the bridging formation and the amount of uv absorber dissolved therein. In addition, the absorptive coating residual on the interstitial areas defining the apertures reduces deleterious reflections of actinic radiation during screen structure fabrication.