Patents by Inventor Kazunari Koide

Kazunari Koide 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).

  • Process for preparing silicon nitride powder
    Patent number: 4514370
    Abstract: Disclosed is a process for preparing silicon nitride powder, which comprises baking a powdery mixture comprising (i) 1 part by weight of silica powder, or a silica-containing substance in terms of silica, (ii) 0.4 to 4 parts by weight of carbon powder, or a substance generating carbon by baking, in terms of carbon and (iii) 0.005 to 1 part by weight of silicon nitride powder synthesized by a silica reduction method, at a temperature of from 1350.degree. to 1550.degree. C. in a non-oxidative atmosphere containing nitrogen.
    Type: Grant
    Filed: June 8, 1984
    Date of Patent: April 30, 1985
    Assignees: Tokyo Shibaura Denki Kabushiki Kaisha, Toshiba Ceramics Co., Ltd
    Inventors: Hiroshi Inoue, Katsutoshi Komeya, Akihiko Tsuge, Kazunari Koide, Masaaki Mori, Tetsuro Urakawa