Patents by Inventor Kenji Nukina

Kenji Nukina 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 fibers elliptical in section
    Patent number: 4859382
    Abstract: A process for preparing a carbon fiber having an elliptical cross section, characterized by the steps of extruding spinnable pitch from a nozzle with an orifice rectangular or otherwise shaped in cross section and having a width/height ratio of more than 1, fully relaxing the molecules orientated by the nozzle on discharge from the nozzle, effecting continuous winding-up to obtain a pitch fiber elliptical in cross section, rendering the fiber infusible and carbonizing the same.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: August 22, 1989
    Assignees: Osaka Gas Company Limited, Dainippon Ink and Chemicals Inc.
    Inventors: Kazutoshi Haraguchi, Eiji Tanigawa, Kenji Nukina, Hiroaki Morita, Toyohiro Maeda