Patents by Inventor Hidefumi Nakano

Hidefumi Nakano 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).

  • Method for producing cubic boron nitride
    Patent number: 5837214
    Abstract: hBN is converted to cBN by keeping it under temperature and pressure conditions within the range of stability of cubic boron nitride, in the presence of at least one compound selected from carbides of alkali metals and alkaline earth metals, or in the presence both of at least one compound selected from carbides of alkali metals and alkaline earth metals and of at least one compound selected from amides and imides of alkali metals and alkaline earth metals.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: November 17, 1998
    Assignee: Showa Denko K.K.
    Inventors: Kousuke Shioi, Tomoyuki Masuda, Hidefumi Nakano
  • Method for producing cubic boron nitride
    Patent number: 5618509
    Abstract: hBN is converted to cBN by keeping it under temperature and pressure conditions within the range of stability of cubic boron nitride, in the presence of a mixture of at least two compounds selected from amides and imides of Li, Ca and Mg, or in its copresence with at least one metal selected from elements of Groups Ia, IIa, IIIa, VIa, VIIa, VIII, IIb and IIIb.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 8, 1997
    Assignee: Showa Denko K.K.
    Inventors: Kousuke Shioi, Hidefumi Nakano
  • Method for producing cubic boron nitride
    Patent number: RE36492
    Abstract: hBN is converted to cBN by keeping it under temperature and pressure conditions within the range of stability of cubic boron nitride, in the presence of a mixture of at least two compounds selected from amides and imides of Li, Ca and Mg, or in its copresence with at least one metal selected from elements of Groups Ia, IIa, IIIa, VIa, VIIa, VIII, IIb and IIIb.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: January 11, 2000
    Assignee: Showa Denko K.K.
    Inventors: Kousuke Shioi, Hidefumi Nakano