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. 23, 2012
Filed:
Sep. 11, 2009
Applicants:
Joerg Freudenberger, Kalchreuth, DE;
Wolfgang Kutschera, Aurachtal, DE;
Gunter Roehrich, Erlangen, DE;
Karin Soeldner, Schwaig, DE;
Inventors:
Joerg Freudenberger, Kalchreuth, DE;
Wolfgang Kutschera, Aurachtal, DE;
Gunter Roehrich, Erlangen, DE;
Karin Soeldner, Schwaig, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/15 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cathode HAS a cathode head in which a surface emitter is arranged that emits electrons upon application of a heating voltage. The surface emitter is fashioned as a parallel surface emitter with at least two emitter surfaces spaced apart from one another, to which at least one electrically conductive cutoff electrode is fed that is galvanically separated from the parallel surface emitter. Such a cathode has a good cutoff capability.