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. 07, 2004
Filed:
Jun. 24, 2003
Koji Naoe, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A process for producing a magnetic recording medium is provided, the medium being formed from a non-magnetic flexible support, a non-magnetic layer comprising a non-magnetic powder and a binder, and a magnetic layer comprising a ferromagnetic powder and a binder. The non-magnetic layer is provided on top of the support, the magnetic layer is provided on top of the non-magnetic layer, and the non-magnetic powder includes two or more types of non-magnetic powder, including carbon black and a non-magnetic powder other than carbon black. The process includes a step of separately dispersing a non-magnetic liquid A that includes a binder and a non-magnetic powder other than carbon black, and a non-magnetic liquid B that includes carbon black and a binder, and a step of stirring and mixing the non-magnetic liquid A and the non-magnetic liquid B to prepare a non-magnetic coating solution.