Patents by Inventor Atushi Nanasawa

Atushi Nanasawa 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).

  • Polyoxymethylene copolymer and composition thereof
    Patent number: 6506850
    Abstract: A polyoxymethylene copolymer having a melting point of 167° to 173° C. and containing a low molecular weight polyoxymethylene copolymer in an amount of not higher than 5000 ppm, and a composition thereof. The copolymer is obtainable by subjecting unstable terminal groups to heat treatment in the presence of 0.05 to 50 ppm by weight of a quaternary ammonium compound. Further, the above composition is used for working parts such as a gear and a cam; apparatuses for image, music and telecommunication; interior and exterior parts for an automobile; and the like.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: January 14, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Noritaka Tanimura, Atushi Nanasawa