Patents by Inventor Masaaki Otsuru

Masaaki Otsuru 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).

  • Polyphenylene sulfide containing covalently bonded chlorine in a reduced amount
    Patent number: 4820801
    Abstract: A highly modified polyphenylene sulfide (hereinafter refer to as "PPS") which contains covalently bonded chlorine in a far less amount than conventional PPS's and is substantially free from ionically bonded chlorine and sodium, is produced by heat-treating a conventional PPS with at least one of organic, sulfur-containing compounds in a solvent capable of dissolving the PPS. Such a PPS is very useful as a coating or encapsulating material for electrical and electronic components, etc.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: April 11, 1989
    Assignees: Tosoh Corp., Hodogaya Chemical Co., Ltd.
    Inventors: Hiroshi Inoue, Toshikazu Kato, Masaaki Otsuru, Noriaki Emura