Patents by Inventor Jiro Suito

Jiro Suito 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).

  • Aliphatic polyester carbonate and process for producing the same
    Patent number: 5654380
    Abstract: Provided are an aliphatic polyester carbonate having biodegradability and having a content of carbonate unit of at least 5 mol %, a weight-average molecular weight of at least 100,000, a melt viscosity of 2,000-50,000 poises at 190.degree. C. and under a load of 60 kg and a melting point of 70.degree.-180.degree. C., and a process for producing said aliphatic polyester carbonate which comprises reacting an aliphatic dihydroxy compound with an aliphatic dibasic acid in the presence of an ester exchange catalyst to obtain an oligomer and then reacting the oligomer with a diaryl carbonate in the presence of the ester exchange catalyst. A phosphorus compound may be added to the aliphatic polyester carbonate for the purpose of stabilization.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: August 5, 1997
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Ryozo Kawai, Mitsuo Miura, Kyohei Takakuwa, Yoshinori Isahaya, Takayasu Fujimori, Jiro Suito, Makoto Nakamura