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. 04, 2011
Filed:
Feb. 27, 2009
Applicant:
Wolfgang Kutschera, Aurachtal, DE;
Inventor:
Wolfgang Kutschera, Aurachtal, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 35/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cathode has a cathode head in which is arranged a surface emitter is arranged that emits electrons upon the application of a heating voltage. At least one electrically conductive barrier plate that is galvanically separated from the surface emitter extends up to the surface emitter. This cathode has a longer lifespan, a high electron emission and a good blocking capability.