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:
Feb. 22, 1977
Filed:
Sep. 02, 1975
Applicant:
Inventors:
William E Buescher, Seneca Falls, PA (US);
Donald R Kerstetter, Emporium, PA (US);
Assignee:
GTE Sylvania Incorporated, Stamford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313337 ; 313 37 ; 313 41 ; 313 45 ; 313340 ; 427 77 ;
Abstract
A fast warmup cathode comprises a substrate of nickel or cathode nickel alloy having an outer and an inner surface. At least an area of the outer surface is formed to receive an electron emissive material. The inner surface is provided with a high heat radiating material. The high heat radiating material comprises vacuum deposited aluminum or magnesium which has been fired at a temperature above the melting point of the material to provide a surface which is darker than the unaltered surface of the substrate. aluminum or magnesium which has been