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:
Nov. 11, 2008
Filed:
Oct. 22, 2004
Masahiko Mori, Kanagawa, JP;
Hiroshi Hashimoto, Kanagawa, JP;
Yuichiro Murayama, Kanagawa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A magnetic recording medium is provided that includes a non-magnetic support, and at least one magnetic layer provided above the non-magnetic support, the magnetic layer having a ferromagnetic powder dispersed in a binder, all or part of the binder being a polyurethane resin obtained by a reaction of a polyol and a polyisocyanate, the polyurethane resin having a glass transition temperature (Tg) of 70° C. to 200° C., and part of the polyol being a diol having at least one epoxy group and two hydroxyl groups per molecule. There is also provided a process for producing the magnetic recording medium, the process including a step of kneading the ferromagnetic powder and the polyurethane resin.