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. 28, 1978
Filed:
Jan. 05, 1976
Applicant:
Inventors:
Masahiko Furukawa, Odawara, JA;
Hiroshi Ogawa, Odawara, JA;
Masashi Aonuma, Odawara, JA;
Yasuo Tamai, Odawara, JA;
Hiromi Nakahara, Odawara, JA;
Masaaki Igarashi, Odawara, JA;
Assignee:
Fuji Photo Film Co., Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; H01F / ;
U.S. Cl.
CPC ...
427132 ; 75 / ; 148105 ; 252 6254 ;
Abstract
This invention relates to a magnetic recording substance comprising a support and a magnetic layer containing a ferromagnetic metal powder of liquid phase reduction type in a binder, the ferromagnetic metal powder being obtained by mixing an aqueous slurry containing the ferromagnetic metal powder with an organic solvent capable of forming a minimum boiling azeotropic mixture with water and subjecting the mixture to distillation to remove the water.