Patents by Inventor Yumi Midorikawa, heir

Yumi Midorikawa, heir 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).

  • Vinyl chloride resin and alkyl methacrylate resin processing aid composition
    Patent number: 4277573
    Abstract: A vinyl chloride resin composition comprises:(1) 100 parts of vinyl chloride polymer; and(2) 0.1 to 30 parts of a polymer processing aid comprising:(A) 40 to 90 parts of a copolymer comprising80 to 100% of an alkyl methacrylate, and0 to 20% of a monomer copolymerizable therewith; and(B) 60 to 10 parts of a copolymer comprising20 to 79% of an alkyl methacrylate,20 to 79% of an aromatic vinyl monomer,1 to 49% of diolefin, and0 to 20% of a monomer copolymerizable therewith,the copolymers (A) and (B) having been wet-blended to provide 100 parts of the polymer processing aid, all quantities expressed in parts and percentages being by weight.
    Type: Grant
    Filed: October 17, 1979
    Date of Patent: July 7, 1981
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaishi
    Inventors: Yo Iizuka, Susumu Midorikawa, deceased, Kiyoshi Midorikawa, heir, Yumi Midorikawa, heir