Patents by Inventor Isao Miyahara

Isao Miyahara 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).

  • Cationic polymer flocculant
    Patent number: 4370464
    Abstract: Novel cationic polymer flocculants are prepared by polycondensation of an epihalohydrin and mixed Mannich reaction products of a monohydric phenol and bisphenol with formaldehyde and dialkylamine. The flocculants are stable in aqueous solutions and show an excellent effect in purification of industrial effluents.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: January 25, 1983
    Assignees: Kyoritsu Yuki Co., Ltd., Mitsubishi Chemical Industries, Ltd.
    Inventors: Katsutoshi Tanaka, Hisao Takeda, Mutsumi Kawano, Isao Miyahara
  • Cationic polymer flocculant prepared by reacting epichlorohydrin and a Mannich reaction product
    Patent number: 4155847
    Abstract: New cationic flocculants are prepared by polycondensation of an epihalohydrin and Mannich reaction products of phenol, formaldehyde, and dialkylamine. The flocculants are useful for flocculation of various kinds of suspension such as various industrial waste waters, pulp slurry in paper making and the like.
    Type: Grant
    Filed: August 10, 1978
    Date of Patent: May 22, 1979
    Assignees: Mitsubishi Chemical Industries, Ltd., Kyoritsu Yuki Co., Ltd.
    Inventors: Katsutoshi Tanaka, Hisao Takeda, Mutsumi Kawano, Isao Miyahara