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:
Feb. 02, 1988
Filed:
Apr. 11, 1986
Fuji Photo Film Co., Ltd., , JP;
Abstract
A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, in which H.sub.1 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of a magnetic hysteresis curve determined in the direction of orientation of the ferromagnetic powder in the magnetic recording layer in the fourth quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the third quadrant; H.sub.2 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of said magnetic hysteresis curve in the first quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the first quadrant; Hc in terms of oersted which is a coercive force of the magnetic recording layer; and Br in terms of gauss which is a residual magnetic flux density of the magnetic recording layer, have the relationship defined by the following inequality: