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. 30, 1990
Filed:
Aug. 22, 1989
Hideo Tamamura, Chichibu, JP;
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Abstract
A process for the preparation of a praseodymium-iron alloy or a praseodymium-neodymium-iron alloy, which comprises using praseodymium fluoride (PrF.sub.3) or a mixture of praseodymium fluoride and neodymium fluoride (NdF.sub.3) as the starting material and carrying out the electrolysis in fused a salt bath having a composition comprising substantially 5 to 34% by weight of PrF.sub.3 or a mixture of PrF.sub.3 and NdF.sub.3 and 95 to 66% by weight of lithium fluoride (LiF) by using an iron cathode, and a process for the preparation of praseodymium metal or a praseodymium-neodymium alloy which comprises using praseodymium fluoride (PrF.sub.3) or a mixture of praseodymium fluoride and neodymium fluoride (NdF.sub.3) as the starting material and carrying out the electrolysis in a fused salt bath having a comprising substantially 5 to 75% by weight of PrF.sub.3 or the mixture of PrF.sub.3 and NdF.sub.3 and 95 to 25% by weight of lithium fluoride (LiF) by using a cathode of carbon or an infusible metal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile