Patents by Inventor Yasuhiro Kurokawa

Yasuhiro Kurokawa 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 preparing aluminum nitride ceramics having superior thermal conductivities
    Patent number: 4650777
    Abstract: Aluminum nitride ceramics is prepared by mixing acetylide of calcium, strontium, barium or other material with raw aluminum nitride powder with a content between 0.02 and 10 wt %, forming the mixture into a predetermined shape and sintering the formed body in a non-oxidizing atmosphere such as nitrogen gas by pressureless and/or pressure sintering technique.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: March 17, 1987
    Assignee: NEC Corporation
    Inventors: Yasuhiro Kurokawa, Kazuaki Utsumi, Hideo Takamizawa
  • Process for pretreating biomasses in advance of their enzymatic treatment
    Patent number: 4642287
    Abstract: An improved process for pretreating biomasses in advance of their enzymatic treatment is provided which process comprises subjecting a biomass together with an aqueous solution of an alkaline compound to kneading and reaction in a biaxial extruder, and which process has advantages that a continuous treatment in a very short time is possible, and the heat quantity required for the pretreatment is greatly reduced.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: February 10, 1987
    Assignee: Shinnenryoyu Kaihatsugijutsu Kenkyukumiai
    Inventors: Takeshi Inoi, Toshiaki Akabane, Yasuhiro Kurokawa, Shingo Matsuoka