Patents by Inventor Katsuzi Ueno

Katsuzi Ueno 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).

  • Method for prevention of loss of transparency of polyarylene ester blends
    Patent number: 4379892
    Abstract: A method for prevention of loss of transparency of shaped articles prepared from a polyarylene ester blend comprising a polyarylene ester and other thermoplastic resin when treated with steam or boiling water, which comprises reducing the sodium content of the blend to less than 70 ppm.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: April 12, 1983
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Katsuzi Ueno, Takashi Maruyama, Haruo Suzuki, Teruo Saito