Patents by Inventor Taishu Yanagisawa

Taishu Yanagisawa 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).

  • Cubic boron nitride, method for producing cubic boron nitride, grinding wheel with cubic boron nitride, and sintered cubic boron nitride compact
    Patent number: 7703710
    Abstract: A method for producing cubic boron nitride in which hBN is held in the presence of a catalyst substance under conditions in which cBN remains thermodynamically stable, to thereby cause hBN to undergo a phase transition to form cBN, wherein the catalyst substance contains a lithium source, a magnesium source, and a carbon source. The performance of cBN is improved even though phase transition ratio from hBN to cBN is increased.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: April 27, 2010
    Assignee: Showa Denko K.K.
    Inventors: Eiji Ihara, Taishu Yanagisawa
  • Cubic boron nitride, method for producing cubic boron nitride, grinding wheel with cubic boron nitride, and sintered cubic boron nitride compact
    Publication number: 20060204421
    Abstract: A method for producing cubic boron nitride in which hBN is held in the presence of a catalyst substance under conditions in which cBN remains thermodynamically stable, to thereby cause hBN to undergo a phase transition to form cBN, wherein the catalyst substance contains a lithium source, a magnesium source, and a carbon source. The performance of cBN is improved even though phase transition ratio from hBN to cBN is increased.
    Type: Application
    Filed: August 19, 2004
    Publication date: September 14, 2006
    Inventors: Eiji Ihara, Taishu Yanagisawa
  • Sintered body
    Publication number: 20030054940
    Abstract: By providing a cBN sintered body which containing, as a binder, at least one species selected from among nitrides, carbides, carbide nitrides, and borides of a Group IVa, Group Va, or Group VIa; and a boride containing a Group VIII element, and a Group IVa element, Group Va element, or Group VIa element; or when containing, as a binder, at least one species selected from among nitrides, carbides, carbide nitrides, and borides of a Group IVa, Group Va, or Group VIa element; a boride containing a Group VIII element, and a Group IVa element, Group Va element, or Group VIa element; and an Al compound, there can be provided a cBN sintered body which attain lower reactivity with a material to be cut while maintaining excellent ability to retain cBN grains.
    Type: Application
    Filed: January 29, 2002
    Publication date: March 20, 2003
    Applicant: Showa Denko Kabushiki Kaisha
    Inventors: Yoshihiko Abe, Taishu Yanagisawa, Masao Fujimori, Kousuke Shioi