Magnetic recording medium

Patent 4596747 Issued on June 24, 1986. Estimated Expiration Date:

July 16, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Dimensionally stable polyester film supports with subbing layer thereon
Patent #: 4132552
Issued on: 01/02/1979
Inventor: Van Paesschen , et al.

Process of producing a magnetic recording element
Patent #: 4183976
Issued on: 01/15/1980
Inventor: Yamada , et al.

Polyester-film backed magnetic recording tape having epoxy subbing layer
Patent #: 4210703
Issued on: 07/01/1980
Inventor: Scantlin , et al.

Magnetic recording medium
Patent #: 4275113
Issued on: 06/23/1981
Inventor: Saito , et al.

Magnetic recording material
Patent #: 4468436
Issued on: 08/28/1984
Inventor: Okita , et al.

Magnetic recording medium
Patent #: 4487802
Issued on: 12/11/1984
Inventor: Miyoshi , et al.

Magnetic recording medium
Patent #: 4511617
Issued on: 04/16/1985
Inventor: Hideyama , et al.

Magnetic recording medium Patent #: 4511629
Issued on: 04/16/1985
Inventor: Konno , et al.

Inventors

Assignee

TDK Corporation

Application

No. 06/631208 filed on 07/16/1984

US Classes:

428/840.5, Chemically identified underlayer binder360/134, Tape360/135, Disk360/136, Drum427/128, Magnetic coating427/131, Applying superposed diverse coating or coating a coated base428/323, Including a second component containing structurally defined particles428/408, SELF-SUSTAINING CARBON MASS OR LAYER WITH IMPREGNANT OR OTHER LAYER428/425.9, Particulate metal or metal compound-containing428/522, Ester, halide or nitrile of addition polymer428/900MAGNETIC FEATURE

Examiners

Primary: Robinson, Ellis P.

Attorney, Agent or Firm

Oblon, Fisher, Spivak, McClelland & Maier

International Classes

G11B 5/62 (20060101)
G11B 5/738 (20060101)

Foreign Application Priority Data

1983-08-09 JP

Abstract

A magnetic recording medium comprising a transparent plastic film substrate, a primer coating layer formed on the substrate and a magnetic layer for magnetic recording formed on the primer coating layer, wherein said primer coating layer is formed by dispersing carbon black in a radiation curable coating material composed essentially of at least one oligomer or polymer containing at least one radiation curable unsaturated double bond per molecule and curing the resulting dispersion by radiation.