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:
Dec. 21, 1988
Applicant:
Inventors:
Arvind Shroff, Paris, FR;
Serge Vilminot, Strasbourg, FR;
Dominique Brion, Thorigny, FR;
Bernard Carriere, Strasbourg, FR;
Veronique Hebert, Strasbourg, FR;
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; C25B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
4283066 ; 427 77 ; 4271264 ; 427230 ; 4283073 ; 4283077 ; 4285395 ; 428699 ; 445 51 ;
Abstract
Disclosed are a method for the fabrication of an impregnated cathode and a cathode obtained thereby. The impregnation is obtained by applying a sol-gel method. The emissive material which impregnates the body of the cathode only partially fills the pores. This facilitates the migration of the material towards the surface and increases the lifetime of the cathode.