Patents by Inventor Zengiro Kawamura

Zengiro Kawamura 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).

  • Stabilization of xanthan gum in aqueous solution
    Patent number: 4810786
    Abstract: A method of stabilizing an aqueous solution of xanthan gum is disclosed, comprising incorporating at least one stabilizing agent selected from thiol derivatives of heterocyclic compounds in an aqueous solution of xanthan gum.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: March 7, 1989
    Assignee: Nitto Chemical Industry Co., Ltd.
    Inventors: Shoichi Kanda, Zengiro Kawamura
  • Stabilization of xanthan gum in aqueous solution
    Patent number: 4607099
    Abstract: A method of stabilizing an aqueous solution of xanthan gum is described, comprising incorporating at least one stabilizing agent selected from the group consisting of 2-mercaptobenzimidazole and derivatives thereof in an aqueous solution of xanthan gum.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: August 19, 1986
    Assignee: Nitto Chemical Industry Co., Ltd.
    Inventors: Shoichi Kanda, Jun Hosoda, Zengiro Kawamura
  • Polymerization of acrylamide in the presence of water-soluble nitrogen compounds
    Patent number: 3951934
    Abstract: A process for producing a substantially nonionic water-soluble acrylamide polymer produced without the occurence of hydrolysis of the acrylamide polymer by heating when the reaction system undergoes an unavoidable heat aging such as due to heat of polymerization comprising polymerizing a comparatively high concentration aqueous solution of acrylamide in the presence of a specific water-soluble nitrogen compound.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: April 20, 1976
    Assignee: Nitto Chemical Industry Co., Ltd.
    Inventors: Iwao Ohshima, Seiichi Chiba, Kenzo Ariyama, Yasuo Ogawa, Zengiro Kawamura