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:
May. 20, 2025
Filed:
Mar. 19, 2020
Applicant:
Central Glass Company, Limited, Yamaguchi, JP;
Inventors:
Mitsuya Ohashi, Ube, JP;
Takanori Hamana, Ube, JP;
Takanori Ogata, Ube, JP;
Ryuichi Nakamura, Ube, JP;
Assignee:
CENTRAL GLASS COMPANY, LIMITED, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G 41/04 (2006.01); B01D 3/14 (2006.01);
U.S. Cl.
CPC ...
C01G 41/04 (2013.01); B01D 3/14 (2013.01);
Abstract
A tungsten hexafluoride manufacturing method of the present invention includes a reaction step of reacting tungsten containing arsenic or an arsenic compound with a gas of a fluorine element-containing compound so as to obtain a mixture containing tungsten hexafluoride and a trivalent arsenic compound, and a distillation step of distilling and purifying the mixture so as to separate and remove a fraction containing the trivalent arsenic compound and to obtain tungsten hexafluoride.