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. 23, 1989
Filed:
Jan. 11, 1988
Applicant:
Inventors:
Samuel S Chung, Liverpool, NY (US);
Charles H Rehkopf, Seneca Falls, NY (US);
Franklin G Reigel, Waterloo, NY (US);
Doanld L Siefker, Ottawa, OH (US);
James R Stowe, Ottawa, OH (US);
Assignee:
North American Philips Consumer Electronics Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
445-6 ; 445-5 ;
Abstract
An improved aging process for a cathode ray tube in which the main focusing grid (G3) is aged at a potential below that of the G2 grid, resulting in significantly reduced incidence of dark center cathode.