Patents by Inventor Fumiaki Ichikawa

Fumiaki Ichikawa 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).

  • Process for preparing polyhydroxycarboxylic acid
    Patent number: 5440008
    Abstract: A process for preparing polyhydroxycarboxylic acid by conducting dehydration polycondensation of hydroxycarboxylic acids in the presence or absence of a catalyst and in the presence or absence of an organic solvent, comprising using a vertical high viscosity reactor during all or a portion of the dehydration polycondensation steps and conducting hot polycondensation while separating and removing low boiling components. The process can provide high molecular weight polyhydroxycarboxylic acid with ease and cheaply in industry.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: August 8, 1995
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Fumiaki Ichikawa, Mineo Kobayashi, Masahiro Ohta, Yasunori Yoshida, Shoji Obuchi, Hiroyuki Itoh