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. 28, 1992
Filed:
Oct. 18, 1990
Applicant:
Inventors:
Andre Bolz, Aachen, DE;
Hermann Wehr, Eschweiler, DE;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
445-3 ; 445-6 ;
Abstract
So as to detect and remove tubes having too low a vacuum before gettering, a d.c. voltage which continuously increases from a low value to a maximum value is applied between the anode (g4) and a second electrode (g3) of a television display tube, the increase in this voltage being stopped as soon as a spark discharge current flows in the tube. The associated value of the d.c. voltage is evaluated as a criterion for the selection of the tubes.
Bolz, Andre. (1992). Method of selecting television display tubes in which the vacuum is too (U.S. Patent No. 5083957). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5083957
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