Patents by Inventor Kiyoji Katayama

Kiyoji Katayama 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).

  • Conjugate fiber, fibrous material and fibrous article made therefrom and process for production thereof
    Patent number: 3998988
    Abstract: A conjugate fiber of a thermoplastic synthetic organic polymer composed of a high melting polymer component and a low melting polymer component, said low melting polymer component having a melting point at least 40.degree. C. lower than that of the high melting polymer component, and having adhered to its surface finely divided particles of an adsorbent. The fiber is a good filter having reduced pressure loss and increased adsorbing power. Fibrous materials and articles are made from these conjugate fibers.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: December 21, 1976
    Assignee: Teijin Limited
    Inventors: Akiro Shimomai, Iwao Fujimoto, Isao Hamana, Kiyoji Katayama