Patents by Inventor Yasuo Mukai

Yasuo Mukai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Magnetic recording medium comprising a specific type of copolymer binder
    Patent number: 4689269
    Abstract: A magnetic recording medium comprising a non-magnetic support, and a magnetic recording layer formed on the support. The layer is made of a composition which comprises magnetic powder dispersed in a resin binder comprising a thermosetting resin and a copolymer of maleic anhydride and an olefinically unsaturated monomer. The monomer is selected from alkyl esters of acrylic and methacrylic acids, alkenes, vinyl chloride, styrene and mixtures thereof.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: August 25, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuo Mukai, Yosuke Takasawa, Masanobu Shimizu, Shunya Shinohara
  • Magnetic recording material
    Patent number: 4643947
    Abstract: A magnetic recording material which comprises a non-magnetic substrate, and a magnetic layer formed on at least one surface of the substrate. The magnetic layer is made of a uniform dispersion of a magnetic powder in a mixture of epoxy and urea resins used in an amount from 40 to 200 wt % of the magnetic powder.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: February 17, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuo Mukai, Masanobu Shimizu
  • Magnetic recording media comprising fine particles of organosilica gel in the magnetic recording layer
    Patent number: 4603080
    Abstract: A magnetic recording medium comprising a non-magnetic support and a magnetic recording layer formed on at least one side of the support, the magnetic recording layer being made of a cured mixture of magnetic particles and an organosilica gel bearing isopropyl end groups dispersed in thermosetting resin binders.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: July 29, 1986
    Assignee: Victor Company of Japan, Limited
    Inventors: Yosuke Takazawa, Yasuo Mukai
  • Magnetic recording media comprising a reaction product of a specific type of fluorine resin and a curing polymer material as a binder in the magnetic layer thereof
    Patent number: 4526836
    Abstract: Magnetic recording media which comprise a non-magnetic support and a magnetic layer formed on at least one side thereof, in which the magnetic layer is made of a magnetic composition which comprises magnetic particles dispersed throughout a resin binder consisting essentially of a reaction product of a fluorine resin having at least two hydroxyl groups in one molecule of the resin and a curing polymer material having functional groups capable of reaction with the fluorine resin through the at least two hydroxyl groups.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: July 2, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuo Mukai, Yosuke Takazawa