Patents by Inventor Kazuo Kumagai

Kazuo Kumagai 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).

  • Plasma reactor for diamond synthesis
    Patent number: 4940015
    Abstract: A plasma reactor for diamond synthesis includes a microwave generator, a waveguide connected to the microwave generator, an antenna disposed within the waveguide to direct the microwaves propagated along the waveguide toward the interior of a reaction chamber, a microwave window provided above the upper wall of the waveguide, a reaction chamber defined by (a) a cylindrical bottom member hermetically joined to the microwave window and the waveguide, (b) a reaction gas inlet port and a gas outlet port in the side wall thereof, and (c) a substrate holder disposed within the reaction chamber in facing opposition to the microwave window so as to be moved toward and away from the microwave window to adjust the distance between the microwave window and the substrate holder to generate a desired microwave resonance mode.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: July 10, 1990
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Koji Kobashi, Kozo Nishimura, Koichi Miyata, Yoshio Kawate, Kazuo Kumagai, Norio Suzuki, Yutaka Kawata, Kiyotaka Ishibashi
  • Antibiotics, and their production
    Patent number: 4764602
    Abstract: A novel antibiotic of the formula: ##STR1## wherein R is a hydrogen atom or a methyl group and preparation of the antibiotic by cultivating Nocardia sp. SC-4710.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: August 16, 1988
    Assignees: Sumitomo Chemical Company, Sumitomo Pharmaceuticals Company, Limited
    Inventors: Kazuo Kumagai, Kiyoshi Taya, Shin Tanaka, Koichi Moriguchi, Masatomo Fukasawa, Akio Fukui