Patents by Inventor by Taeko Midorikawa, heir

by Taeko 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 composition with processing aid
    Patent number: 4268636
    Abstract: A composition comprising polyvinyl chloride and a novel polymer processing aid is provided. The polymer processing aid can be obtained either by blending in latex form an alkyl methacrylate copolymer (A) and a copolymer (B) comprising as its essential constituents an alkyl methacrylate, a dialkyl itaconate or an alkyl acrylate, and a diolefin, or by copolymerizing one of the copolymers in the presence of the other copolymer.The polymer processing aid thus obtained improves the processability of the vinyl chloride resin composition with less reduction in impact strength.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: May 19, 1981
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yo Iizuka, Haruhiko Yusa, Susumu Midorikawa, deceased, by Taeko Midorikawa, heir