Patents by Inventor Tetsuo Yanagi

Tetsuo Yanagi 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 producing carbon fibers
    Patent number: 4356158
    Abstract: A process for producing carbon fibers from various kinds of pitches wherein the calorific values of the pitches are measured and the pitches thereafter subjected to a suitable procedure for producing carbon fibers therefrom depending on their measured calorific value.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: October 26, 1982
    Assignee: Nippon Carbon Co., Ltd.
    Inventors: Toshikatsu Ishikawa, Haruo Teranishi, Akira Yokoyama, Tetsuo Yanagi, Hirofumi Harada