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:
Mar. 20, 1990
Filed:
Jan. 04, 1988
Applicant:
Inventors:
Lawrence W Dougherty, Sleepy Hollow, IL (US);
James R Fendley, Arlington Heights, IL (US);
William H Meyle, Naperville, IL (US);
James L Kraner, Barrington, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
5128 / ; 5123 / ; 5121 / ; 5121 / ; 5124 / ;
Abstract
For use in the manufacture of flat tension mask cathode ray tubes, a method for forming on a mask support structure a mask receiving surface in a plane parallel to and at a precise fixed distance from the plane of the inner surface of a glass front panel embodying the tube's viewing screen.