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. 02, 1993
Filed:
Apr. 23, 1991
Applicant:
Inventors:
Assignee:
Industrial Technology Research Instiute, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
75349 ; 148101 ;
Abstract
A process for producing rare earth-iron-boron permanent magnet alloy powders comprising; heating pellets comprising a mixture of rare earth oxides, iron power, ferroboron powder and calcium grandules for reaction/diffusion to obtain a rare earth-iron-boron alloy of uniform composition, crushing the resulting alloy to form a powder and contacting the powder with an aqueous solution of acetic acid containing a non-ionic surfactant and an alkai metal acetate.
Liu, Ti. (1993). Process for manufacturing rare earth-iron-boron permanent magnet alloy (U.S. Patent No. 5183494). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5183494
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