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. 11, 1989
Filed:
Sep. 02, 1987
Applicant:
Inventor:
Haruhisa Yamamoto, Kawasaki, JP;
Assignee:
Nippon Zeon Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
252 6257 ; 252 6258 ; 252 6259 ; 252 626 ; 252 6262 ; 252 6263 ; 252 6264 ; 252 6256 ;
Abstract
A magnetic powder for magnetic recording which has an average particle diameter of 0.01 to 0.3 micrometers and is represented by the following general composition formula