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. 04, 2025
Filed:
Apr. 11, 2023
Applicant:
A.l.m.t. Corp., Tokyo, JP;
Inventor:
Hidenobu Nishino, Toyama, JP;
Assignee:
A.L.M.T. Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 27/04 (2006.01); H01J 61/06 (2006.01); H01J 61/073 (2006.01);
U.S. Cl.
CPC ...
C22C 27/04 (2013.01); H01J 61/06 (2013.01); H01J 61/0732 (2013.01); H01J 61/0735 (2013.01);
Abstract
A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.