Patents by Inventor Mizunori Takahashi

Mizunori Takahashi 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).

  • Rosin emulsion sizing agent
    Patent number: 4943608
    Abstract: A rosin emulsion sizing agent comprising a fortified rosin, an at least partially quarternized product copolymer principal consisting of a (meth)acrylic acid alkylaminoalkyl ester or amide monomer and water exhibits excellent sizing effect in a papermaking system of higher pH, higher water hardness and higher temperature, in which conventional anionic rosin emulsion sizing agents cannot effectively function.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: July 24, 1990
    Assignee: Dic-Hercules Chemicals, Inc.
    Inventors: Mizunori Takahashi, Tsuyoshi Ikeda, Yoshiharu Yamaguchi
  • Rosin emulsion sizing agent
    Patent number: 4681909
    Abstract: A rosin emulsion sizing agent comprising 20 to 50% by weight of fortified rosin, 2 to 30% by weight of a saponification product of a styrene/acrylic acid copolymer or a styrene/methacrylic acid copolymer, and the remainder being water.
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: July 21, 1987
    Assignee: Dic-Hercules Chemicals, Inc.
    Inventors: Koji Ohta, Masaaki Yoshimura, Mizunori Takahashi