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. 13, 2007
Filed:
Feb. 10, 2004
Applicant:
Victor Katsap, Glenham, NY (US);
Inventor:
Victor Katsap, Glenham, NY (US);
Assignee:
Toshiba Machine America, Inc., Elk Grove Village, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J 19/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved thermionic cathode is provided. The cathode has a carbon-coated cone surface and reduced cone angle (e.g. typically 60 degrees or less) that delivers an electron beam with high angular intensity and brightness and exhibits increased longevity.