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. 14, 1993
Filed:
Mar. 26, 1991
Hiroshi Hashimoto, Kanagawa, JP;
Hideomi Watanabe, Kanagawa, JP;
Akira Ushimaru, Kanagawa, JP;
Kazuko Hanai, Kanagawa, JP;
Akihiro Matsufuji, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A magnetic recording medium comprising a non-magnetic support having thereon a multi-layer magnetic layer structure comprising ferromagnetic fine powder and a binder, wherein said multi-layer magnetic layer structure is formed by coating a first composition containing the ferromagnetic fine powder and a polyisocyanate compound on the non-magnetic support to form a first magnetic layer and coating a second composition containing ferromagnetic fine powder and an epoxy compound having at least one epoxy group or a coupling agent on said first magnetic layer to form a second magnetic layer, wherein coating of said second magnetic layer is conducted simultaneously with or after coating said first magnetic layer while said first magnetic layer is still in a wet state, by a simultaneous or successive multiple layered coating method.