Patents by Inventor Mitsuru Matsuura

Mitsuru Matsuura 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).

  • Patent number: 6841265
    Abstract: The objective of the present invention is to provide a titanium alloy vacuum container and vacuum parts that can easily achieve an ultra-high vacuum in a short time through vacuum evacuation. The titanium alloy of the titanium alloy vacuum container and vacuum parts has a compact structure composed of fine grains, each having a size of approximately not more than 10 ?m, with a surface that is exposed to at least vacuum being set to have a surface roughness of not more than 50 nm; and in this structure, preferably, the surface roughness thereof may be set to not more than 10 nm, the titanium alloy may have a hardness in a range of not less than 230 Hv to not more than 310 Hv, and the titanium alloy may have a passivity surface film made by a thin titanium oxide layer or nitride layer that is formed on the surface thereof. The titanium alloy, which is desirably used in such titanium alloy vacuum container and vacuum parts, contains 0.3 wt. % to 0.5 wt. % of iron and 0.3 wt. % to 0.5 wt.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: January 11, 2005
    Assignees: Yamaguchi Technology Licensing Organization, Ltd., Shinko Industries Co., Ltd.
    Inventors: Hiroki Kurisu, Mitsuru Matsuura, Setsuo Yamamoto, Masaki Hesaka, Atsushi Takemura
  • Patent number: 6746786
    Abstract: A magnetic recording medium, comprises a substrate; and a Co-containing spinel-type iron oxide thin film formed on the substrate, having a Co content of 1 to 20 mol % based on Fe, a coercive force value of not less than 159 kA/m (2,000 Oe), a thickness of 5 to 200 nm, a center line average height Ra of 0.1 to 0.8 nm and a maximum height (Rmax) of not more than 10 nm. The magnetic recording medium is capable of exhibiting a relatively high coercive force, especially a coercive force of not less than 159 kA/m (2,000 Oe) despite as small a film thickness as not more than 200 nm, and an excellent surface smoothness.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: June 8, 2004
    Assignee: Toda Kogyo Corporation
    Inventors: Teruaki Santoki, Yasuo Kakihara, Mitsuru Matsuura, Setsuo Yamamoto
  • Publication number: 20030162042
    Abstract: The objective of the present invention is to provide a titanium alloy vacuum container and vacuum parts that can easily achieve an ultra-high vacuum in a short time through vacuum evacuation.
    Type: Application
    Filed: December 30, 2002
    Publication date: August 28, 2003
    Inventors: Hiroki Kurisu, Mitsuru Matsuura, Setsuo Yamamoto, Masaki Hesaka, Atsushi Takemura
  • Publication number: 20020068193
    Abstract: A magnetic recording medium, comprises a substrate; and a Co-containing spinel-type iron oxide thin film formed on the substrate, having a Co content of 1 to 20 mol % based on Fe, a coercive force value of not less than 159 kA/m (2,000 Oe), a thickness of 5 to 200 nm, a center line average height Ra of 0.1 to 0.8 nm and a maximum height (Rmax) of not more than 10 nm. The magnetic recording medium is capable of exhibiting a relatively high coercive force, especially a coercive force of not less than 159 kA/m (2,000 Oe) despite as small a film thickness as not more than 200 nm, and an excellent surface smoothness.
    Type: Application
    Filed: October 15, 2001
    Publication date: June 6, 2002
    Inventors: Teruaki Santoki, Yasuo Kakihara, Mitsuru Matsuura, Setsuo Yamamoto
  • Patent number: 6268024
    Abstract: A magnetic recording medium is prepared by forming on a plastic substrate, a nickel oxide underlayer having a plane (200) which is predominantly oriented in parallel with the surface of the plastic substrate, then forming on the nickel oxide underlayer at a substrate temperature of less 240° C., a cobalt-containing magnetite thin film having a plane (400) which is predominantly oriented in parallel with the surface of the plastic substrate, and finally oxidizing the cobalt-containing magnetite thin film in a plasma-activated oxygen atmosphere containing a rare gas at a substrate temperature of less than 240° C. while incorporating the rare gas into oxygen. This results in a cobalt-containing maghemite thin film as a perpendicular magnetic film having a spacing of a plane (400) of not more than 2.082 Å. The magnetic recording medium so produced is useful for high-density recording using a plastic substrate.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: July 31, 2001
    Assignee: Toda Kogyo Corporation
    Inventors: Takanori Doi, Kousaku Tamari, Yasuo Kakihara, Kenichi Nakata, Mitsuru Matsuura, Setsuo Yamamoto
  • Patent number: 6221519
    Abstract: A magnetic recording medium comprising: a plastic substrate; a nickel oxide underlayer formed on said substrate; and a cobalt-containing maghemite thin film formed on said nickel oxide underlayer, containing cobalt at a molar ratio of cobalt to iron of 0.01:1 to 0.1:1, and having either a spacing of a plane (311) of not more than 2.510 Å, a spacing of a plane (222) of not more than 2.415 Å or a spacing of a plane (220) of not more than 2.950 Å, a ratio value of an X-ray diffraction pattern peak intensity of either of the planes (311), (222) and (220) of said cobalt-containing maghemite thin film to an X-ray diffraction pattern peak intensity of the plane (400) thereof being more than 0.5. Such magnetic recording medium suitably applicable to existent magnetic recording systems using a ring-type magnetic head and capable of using a plastic substrate for providing a magnetic recording medium for high-density recording.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: April 24, 2001
    Assignee: Toda Kogyo Corporation
    Inventors: Takanori Doi, Kousaku Tamari, Yasuo Kakihara, Kenichi Nakata, Mitsuru Matsuura, Setsuo Yamamoto
  • Patent number: 6187462
    Abstract: A magnetic recording medium of the present invention comprises: a plastic substrate; and a cobalt-containing maghemite thin film formed on said substrate, containing cobalt at a molar ratio of cobalt to iron of not more than 0.06:1, and having either a spacing of a plane (311) of not more than 2.510 Å, a spacing of a plane (222) of not more than 2.415 Å or a spacing of a plane (220) of not more than 2.950 Å; and has a coercive force of not less than 2,000 Oe. Such magnetic recording medium suitably applicable to existent magnetic recording systems using a ring-type magnetic head and capable of using a plastic substrate for providing a magnetic recording medium for high-density recording.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: February 13, 2001
    Assignee: Toda Kogyo Corporation
    Inventors: Takanori Doi, Kousaku Tamari, Yasuo Kakihara, Kenichi Nakata, Mitsuru Matsuura, Setsuo Yamamoto