Patents by Inventor Muneyoshi Ochi

Muneyoshi Ochi 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
    Patent number: 7157136
    Abstract: A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 ?m, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 ?m or less, and the primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 ?m to 0.1 ?m.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: January 2, 2007
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Muneyoshi Ochi, Takeki Mochizuki, Koh Tsukamoto
  • Magnetic recording medium
    Patent number: 7060340
    Abstract: A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 ?m, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 ?m or less, and the primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 ?m to 0.1 ?m.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: June 13, 2006
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Muneyoshi Ochi, Takeki Mochizuki, Koh Tsukamoto
  • Magnetic recording medium
    Publication number: 20050100763
    Abstract: A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 ?m, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 ?m or less, and the primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 ?m to 0.1 ?m.
    Type: Application
    Filed: December 9, 2004
    Publication date: May 12, 2005
    Inventors: Muneyoshi Ochi, Takeki Mochizuki, Koh Tsukamoto
  • Magnetic recording medium
    Publication number: 20040185227
    Abstract: A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 &mgr;m, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 &mgr;m or less, and the primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 &mgr;m to 0.1 &mgr;m.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 23, 2004
    Applicant: Hitachi Maxell, Ltd.
    Inventors: Muneyoshi Ochi, Takeki Mochizuki, Koh Tsukamoto
  • Magnetic recording medium
    Patent number: 6723415
    Abstract: A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 &mgr;m, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 &mgr;m or less, and the primer layer contains 2 to 30 % by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 &mgr;m to 0.1 &mgr;m.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: April 20, 2004
    Assignee: Hitachi Maxell, Ltd,
    Inventors: Muneyoshi Ochi, Takeki Mochizuki, Koh Tsukamoto
  • Magnetic recording medium
    Publication number: 20010024741
    Abstract: A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 &mgr;m, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 &mgr;m or less, and the primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 &mgr;m to 0.1 &mgr;m.
    Type: Application
    Filed: December 28, 2000
    Publication date: September 27, 2001
    Inventors: Muneyoshi Ochi, Takeki Mochizuki, Koh Tsukamoto
  • Magnetic tape cartridge made from heat resistant resinous material
    Patent number: 4791503
    Abstract: A magnetic tape cartridge comprising a main case made of a resinous material selected from a copolymer comprising repeating units derived from a nitrogen-containing heterocyclic compound and a blend containing a homo- or co-polymer comprising repeating units derived from a nitrogen-containing heterocyclic compound, which has good heat resistance and suffers from less deformation at a high temperature. The content of the nitrogen-containing compound in the copolymer or blend is from 5 to 30% by weight.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: December 13, 1988
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Yoshinori Yamamoto, Muneyoshi Ochi