Patents by Inventor Arimichi Okamoto

Arimichi Okamoto 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 spinning modified synthetic fibers
    Patent number: 4085174
    Abstract: Synthetic fibers capable of absorbing aqueous medium are manufactured by simultaneously extruding the fiber material and a second material in a core and sheath arrangement. Turbulence is produced in the zone where these two materials combine which results in undulations in their cross-sections. The second material is then dissolved away with a solvent to leave a fiber with an undulating surface. When the second material is extruded as the core, the fiber is hollow with undulations on the inside while when the second material is extruded as the sheath the solid fiber has an undulating outer surface.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: April 18, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tatsuo Ishikawa, Keiji Yamashita, Norio Okubo, Masahira Sakashita, Arimichi Okamoto, Tetsuhiro Kusunose