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:
Jun. 15, 2021
Filed:
Apr. 02, 2019
Applicant:
Canon Electron Tubes & Devices Co., Ltd., Otawara, JP;
Inventor:
Tomonari Ishihara, Otawara, JP;
Assignee:
CANON ELECTRON TUBES & DEVICES CO., LTD., Otawara, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J 35/06 (2006.01); H01J 35/10 (2006.01);
U.S. Cl.
CPC ...
H01J 35/065 (2013.01); H01J 35/06 (2013.01); H01J 35/066 (2019.05); H01J 35/101 (2013.01);
Abstract
According to one embodiment, an X-ray tube includes an anode target, a cathode including a first filament and a converging electrode, and a vacuum envelope. The converging electrode includes a flat front surface, a flat first surface, a first groove portion, and a pair of first protruding portions. The pair of first protruding portions is formed to protrude from the first surface toward the front surface and sandwich the first groove portion in a first length direction. An upper surface is formed of a plurality of flat inclined surfaces.