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:
Sep. 15, 1992
Filed:
Mar. 30, 1992
Applicant:
Inventors:
Akihito Ohtsuka, Sakura, JP;
Yoshio Kijima, Tokyo, JP;
Assignee:
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G22F / ;
U.S. Cl.
CPC ...
419 25 ; 419 36 ; 419 37 ; 419 38 ; 419 57 ; 419 58 ; 419 60 ;
Abstract
A composition comprising a powder of iron and nickel and a binder (e.g. wax) is injection molded. The powder contains 0.5 to 10% by weight of nickel and has an average particle diameter not exceeding 45 microns. The binder is removed from the molded product. The molded product is sintered, and the sintered product is cooled to room temperature slowly at a rate of 2.degree. C. to 50.degree. C. per minute. The sintered product is of an iron-nickel alloy, has a high density and a high level of soft ferromagnetic properties, and may be complicated in shape.