Patents by Inventor Junyou Nakagawa

Junyou Nakagawa 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 aromatic polyester fiber
    Patent number: 5045257
    Abstract: A process for producing aromatic polyester fibers having a high strength and resistances to fibrillation, buckling, abrasion and fatigue. The process comprises spinning aromatic polyesters capable of forming anisotropic melts and heat treating the as-spun fibers, the heat treatment being characterized by a combination of a first heat treatment in an inert atmosphere and a successive heat treatment in an active atmosphere.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: September 3, 1991
    Assignee: Kuraray Co., Ltd.
    Inventors: Junyou Nakagawa, Yoshio Kishino, Youichi Yamamoto