Patents by Inventor Katuo Wada

Katuo Wada 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).

  • Polypropylene resin compositions
    Patent number: 5023286
    Abstract: The present invention relates to polypropylene resin compositions that exhibit an improved smell over prior art polypropylene resin compositions and comprises a polypropylene resin containing an inorganic filler, at least one phenolic antioxidant, at least one phosphorus antioxidant, and fine powders comprising aggregates of intimately bonded particles comprising zinc oxide, titanium dioxide and water.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: June 11, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masaru Abe, Yoichi Kawai, Masami Maki, Katuo Wada