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. 20, 2018
Filed:
Sep. 10, 2014
Applicant:
Hitachi Metals, Ltd., Tokyo, JP;
Inventors:
Shinsuke Terazawa, Mishima-gun, JP;
Hideo Nitta, Mishima-gun, JP;
Assignee:
HITACHI METALS, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01T 1/20 (2006.01); C09K 11/77 (2006.01); C04B 35/547 (2006.01); C04B 35/515 (2006.01); C04B 35/626 (2006.01); C01F 17/00 (2006.01);
U.S. Cl.
CPC ...
C09K 11/7771 (2013.01); C01F 17/0093 (2013.01); C04B 35/5156 (2013.01); C04B 35/547 (2013.01); C04B 35/6265 (2013.01); C04B 35/6268 (2013.01); C09K 11/7701 (2013.01); G01T 1/20 (2013.01); G01T 1/2006 (2013.01); C01P 2002/72 (2013.01); C01P 2002/88 (2013.01); C01P 2004/03 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3229 (2013.01); C04B 2235/44 (2013.01); C04B 2235/442 (2013.01); C04B 2235/443 (2013.01); C04B 2235/444 (2013.01); C04B 2235/447 (2013.01); C04B 2235/448 (2013.01); C04B 2235/449 (2013.01); C04B 2235/662 (2013.01);
Abstract
A production method of rare earth oxysulfide comprising a step of mixing a rare earth compound with sulfuric acid and/or sulfate in such a proportion that sulfate ions are 0.75-1.75 mol to 1 mol of a rare earth element, thereby preparing a reaction solution to obtain a product; a step of calcining the product to obtain calcined powder; and a step of reducing the calcined powder to obtain rare earth oxysulfide.