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:
Oct. 02, 2001
Filed:
Mar. 14, 2000
Applicant:
Inventor:
Juergen Leppert, Forchheim, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 1/700 ;
U.S. Cl.
CPC ...
C01F 1/700 ;
Abstract
In a method for producing rare earth oxysulfide powder, reduction of rare earth oxysulfate to rare earth oxysulfide powder ensues under a protective gas with a reducing agent which is hydrogen or carbon monoxide, or a hydrocarbon gas such as methane or propane.