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:
Apr. 02, 1991
Filed:
May. 26, 1989
Applicant:
Inventor:
Mohammad H Ghandehari, Brea, CA (US);
Assignee:
Union Oil Company of California, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
75254 ; 148105 ; 419 12 ; 419 20 ;
Abstract
Permanent magnets are prepared by a method comprising mixing a particulate rare earth-iron-boron alloy with a particulate additive metal powder, compacting the aligned mixture to form a shape, and heating the compacted shape at a temperature at least 150.degree. C. less than the sintering temperature of a rare earth-iron-boron alloy and usually in the range from about 700.degree. C. to less than 850.degree. C.