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:
Nov. 03, 2020
Filed:
Feb. 21, 2019
Applicant:
Varex Imaging Corporation, Salt Lake City, UT (US);
Inventors:
Wayne R. Hansen, Centerville, UT (US);
Vance S. Robinson, South Jordan, UT (US);
Kasey O. Greenland, West Jordan, UT (US);
Gangqiang Wang, Salt Lake City, UT (US);
Assignee:
Varex Imaging Corporation, Salt Lake City, UT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 35/06 (2006.01); H01J 35/14 (2006.01); H01J 35/18 (2006.01); H01J 35/10 (2006.01);
U.S. Cl.
CPC ...
H01J 35/06 (2013.01); H01J 35/101 (2013.01); H01J 35/14 (2013.01); H01J 35/18 (2013.01);
Abstract
An emitter for a closed x-ray tube includes an emitter body formed of a low work function emitter material, the emitter body having a major surface and a secondary surface. The major surface is adapted for emission of electrons from the low work function material. The emitter assembly is adapted to reduce an emission current density emitted from the secondary surface of the emitter body, as compared to the major surface.