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:
Oct. 20, 2015
Filed:
Oct. 04, 2012
Applicant:
Nuflare Technology, Inc., Kanagawa, JP;
Inventor:
Victor Katsap, Glenham, NY (US);
Assignee:
NuFlare Technology, Inc., Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 19/04 (2006.01); H01J 1/14 (2006.01); H01J 1/13 (2006.01); H01J 9/04 (2006.01); H01J 1/148 (2006.01); H01J 37/065 (2006.01);
U.S. Cl.
CPC ...
H01J 1/14 (2013.01); H01J 1/148 (2013.01); H01J 9/04 (2013.01); H01J 37/065 (2013.01); H01J 2237/06308 (2013.01);
Abstract
An improved cathode comprises a cone-shaped emitter with a carbon-based coating applied to the emitter cone surface, in which there is a narrow annular gap between the emitter body and the carbon coating. The gap prevents direct contact between the carbon coating and the crystalline emitting material, thereby preventing damaging interactions and extending the useful lifetime of the cathode.