Patents by Inventor Michiyasu Nishiyama

Michiyasu Nishiyama 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).

  • Surface-coated cutting tool with hard coating layer having excellent abrasion resistance
    Patent number: 7597511
    Abstract: In a surface-coated cutting tool, (a) a Ti compound layer as a lower layer and (b) an ?-type Al2O3 layer as an upper layer having a crystal grain structure of an even polygonal shape (including an even hexagonal shape) and an elongate shape and containing Zr are deposited on the surface of a tool substrate. In the surface-coated cutting tool, the above mentioned crystal grains of which insides are divided by at least one crystal lattice interface with the constituent atom covalent lattice point type expressed by ?3 occupying 60% or more as an area ratio in the crystal grains of the upper layer.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: October 6, 2009
    Assignee: Mitsubishi Materials Corporation
    Inventors: Kouhei Tomita, Michiyasu Nishiyama, Akira Osada, Eiji Nakamura
  • SURFACE-COATED CUTTING TOOL WITH HARD COATING LAYER HAVING EXCELLENT ABRASION RESISTANCE
    Publication number: 20090170415
    Abstract: In a surface-coated cutting tool, (a) a Ti compound layer as a lower layer and (b) an ?-type Al2O3 layer as an upper layer having a crystal grain structure of an even polygonal shape (including an even hexagonal shape) and an elongate shape and containing Zr are deposited on the surface of a tool substrate. In the surface-coated cutting tool, the above mentioned crystal grains of which insides are divided by at least one crystal lattice interface with the constituent atom covalent lattice point type expressed by ?3 occupying 60% or more as an area ratio in the crystal grains of the upper layer.
    Type: Application
    Filed: December 24, 2008
    Publication date: July 2, 2009
    Applicant: Mitsubishi Materials Corporation
    Inventors: Kouhei Tomita, Michiyasu Nishiyama, Akira Osada, Eiji Nakamura