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:
Aug. 06, 1996
Filed:
Jul. 31, 1995
Applicant:
Inventors:
Kazuyuki Hayashi, Hiroshima, JP;
Minoru Ohsugi, Hiroshima, JP;
Hiroko Morii, Hiroshima, JP;
Norio Sugita, Hiroshima, JP;
Assignee:
Toda Kogyo Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
252 6258 ; 252 6259 ; 428404 ; 428 653 ; 428 656 ;
Abstract
Disclosed herein magnetic particles for magnetic recording which comprise acicular or plate-like magnetic particles and not less than 0.01 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2 and based on the acicular or plate-like magnetic particles) of an oxide or hydroxide containing Al, Si or both Al and Si and adhered to the surfaces of the acicular or plate-like magnetic particles, and which have not less than 0.50 of a molecular-weight-dependent parameter .alpha. represented by the following formula (I):