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:
Jan. 08, 1980
Filed:
Aug. 04, 1978
Applicant:
Inventors:
Ralph H Nielsen, Albany, OR (US);
Patrick H Payton, Albany, OR (US);
Assignee:
Teledyne Industries, Inc., Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
423 68 ; 423 62 ; 7510 / ; 75121 ;
Abstract
A method of extracting high purity columbium oxide, also known as niobium oxide, from barium-rich pyrochlore ores by treating the ore with a calcium salt such as calcium chloride, fusing the ore with caustic soda and a fluorine containing compound, and subsequently acid leaching the fused mass; and from calcium-rich pyrochlore ores by fusing the ore with caustic soda and a fluorine containing compound, and subsequently acid leaching the fused mass. The amount of fluorine containing compound used should contain anywhere from above 2% to about 10% fluorine content by weight relative to the ore.