Patents by Inventor Masatsugu Matsunaga

Masatsugu Matsunaga 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).

  • Stabilized polyphenylene ether resin composition
    Patent number: 3954904
    Abstract: Polyphenylene ether resins are stabilized with a substituted dicarboxylic acid dihydrazide.
    Type: Grant
    Filed: October 30, 1974
    Date of Patent: May 4, 1976
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Takanari Nawata, Masao Okabe, Masatsugu Matsunaga, Masaharu Kimura, Norio Sayama
  • Stabilized polyphenylene ether type resin composition
    Patent number: 3952072
    Abstract: Stabilized polyphenylene ether type resin composition obtained by compounding a polyphenylene ether type resin with one or more of stabilizer-component such as those respectively (a) a high molecular phosphorous ester having at least three phosphorous ester-bondings per molecule, (b) a high molecular phosphorous ester as said above and dicarboxylic acid dihydrazide substitution product, (c) a high molecular phosphorous ester as said above and steric hindered phenols and (d) a high molecular phosphorous ester as said above, steric hindered phenols and dicarboxylic acid dihydrazide substitution product; and, if desired, boron oxide.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: April 20, 1976
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Masanobu Masu, Masaharu Kimura, Masao Okabe, Norio Sayama, Masatsugu Matsunaga