Patents by Inventor Takefumi Kouno

Takefumi Kouno 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 carbon/carbon composite
    Patent number: 5192471
    Abstract: A carbon/carbon composite is prepared by impregnating a bundle of carbon fibers with a polymer of a nitrogen-containing heterocyclic compound, carbonizing the thus-impregnated carbon fiber bundle under pressure or under pressing and, optionally, further carbonizing the thus-carbonized carbon fiber bundle at atmospheric pressure.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: March 9, 1993
    Assignee: Nippon Oil Company, Limited
    Inventors: Seiichi Uemura, Yoshio Sohda, Osamu Kato, Takefumi Kouno, Tsutomu Kihara
  • Process for preparing carbon/carbon composite
    Patent number: 5186873
    Abstract: A carbon/carbon composite is prepared by polymerizing a polycyclic aromatic compound in the presence of a coupling agent, then impregnating a bundle of carbon fibers with the resulting polymer, then carbonizing the thus-impregnated carbon fiber bundle under pressure or under pressing, and optionally, further carbonizing the thus-carbonized carbon fiber bundle at atmospheric pressure.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: February 16, 1993
    Assignee: Nippon Oil Company, Limited
    Inventors: Seiichi Uemura, Yoshio Souda, Osamu Kato, Takefumi Kouno, Tsutomu Kihara
  • Process for preparing carbon/carbon composite
    Patent number: 5181979
    Abstract: A carbon/carbon composite is prepared by mixing 100 parts of a carbonaceous pitch with 1-45 parts by weight of at least one aromatic compound containing at least one functional group selected from nitro and hydroxyl groups, then impregnating a bundle of carbon fibers with the resulting mixture, thereafter carbonizing the thus-impregnated carbon fiber bundle under pressure or under pressing, and if necessary, further carbonizing the thus-carbonized carbon fiber bundle at atmospheric pressure.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: January 26, 1993
    Assignee: Nippon Oil Company, Limited
    Inventors: Seiichi Uemura, Yoshio Sohda, Osamu Kato, Takefumi Kouno, Tsutomu Kihara