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:
Aug. 10, 1976
Filed:
Jul. 09, 1975
Applicant:
Inventors:
William E Buescher, Seneca Falls, NY (US);
Donald R Kerstetter, Emporium, PA (US);
Assignee:
GTE Sylvania Incorporated, Stamford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313331 ; 313 30 ; 313 37 ; 313 46 ; 313270 ; 313337 ;
Abstract
A fast warm up, die-drawn, low mass cathode cap is substantially cup-shaped having a closed end and an upstanding side wall integral therewith. The thickness of the side wall is less than that of the closed end, permitting more of the heater energy to be concentrated in the closed end which carries, on the outer surface thereof, the electron emissive material.