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. 09, 2021
Filed:
Aug. 29, 2019
Fujifilm Corporation, Tokyo, JP;
Kenji Naoi, Minami-ashigara, JP;
Masashi Shirata, Minami-ashigara, JP;
Wataru Kikuchi, Minami-ashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A magnetic recording medium, a composition for it, and a magnetic recording and reproducing apparatus are provided. The medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the support. The magnetic layer also includes a compound including one or more partial structures selected from partial structures represented by Formulas 1 and 2, and a polyalkyleneimine chain. The composition for the recording medium includes a ferromagnetic powder and the compound. In Formulas 1 and 2, Land Leach independently represents a divalent linking group, Zand Zeach independently represents a monovalent group represented by —OM or a monovalent group represented by —OA, M represents a hydrogen atom or an alkali metal atom, and Arepresents an ammonium cation.