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. 16, 1997
Filed:
Sep. 09, 1994
Applicant:
Inventors:
Mitsuo Sugimoto, Tokyo, JP;
Akihiko Saito, Nagoya, JP;
Assignee:
Daido Tokushuko Kabushiki Kaisha, Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
252 6262 ; 423594 ; 264299 ; 264332 ; 264337 ; 264338 ;
Abstract
A method of producing magnetic soft ferrite of the general formula: M.sub.x Zn.sub.1-x O.Fe.sub.2 O.sub.3 (M stands for one or more of Cu, Mn, Ni, Fe, Co and Mg; and X is in the range of 0.4-0.7) by melting and casting is disclosed. Melting is carried out under controlling evaporation of Zn-component in the material of the ferrite by disposing Zn-source around the material, sealing up the melting chamber as tight as possible, or under a pressurized gas atmosphere so as to obtain the product having uniform and precise composition.