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:
Dec. 17, 1991
Filed:
Jun. 08, 1990
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428328 ; 4284246 ; 4284259 ; 428694 ; 428900 ;
Abstract
A novel magnetic recording medium is disclosed comprising a non-magnetic support having provided thereon a magnetic layer containing a ferromagnetic powder and a binder, the ferromagnetic powder having a crystalline size of 250 .ANG. or less, and the surface of the magnetic layer having an ultramicrohardness of 40 g/(.mu.m).sup.2 or more.
Hashimoto, Hiroshi. (1991). Magnetic recording medium comprising a vinyl chloride based resin group (U.S. Patent No. 5073439). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5073439
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile