Patents by Inventor Kenji Manabe

Kenji Manabe 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).

  • Optical device
    Patent number: 5135791
    Abstract: An optical device comprising a mixture of a polymer constituted mainly of aromatic vinyl monomer units and polyphenylene ether, characterized in that the average molecular weight of the polyphenylene ether is from 0.3 to 0.7 expressed in terms of the intrinsic viscosity measured in chloroform at 25.degree. C.
    Type: Grant
    Filed: November 20, 1990
    Date of Patent: August 4, 1992
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shozaburo Imai, Michihisa Isobe, Masahiko Moritani, Masahiro Niwano, Kenji Manabe
  • Magneto optical disk substrate comprising an aromatic vinyl monomer and a polyphenylene ether
    Patent number: 4845142
    Abstract: Optical devices such as optical disk substrates and lenses are prepared by molding a resin composition comprising 100 parts by weight of a mixture of 30 to 70% by weight of a polymer in which 50% by weight or more is composed of aromatic vinyl monomer units and 70 to 30% by weight of a polyphenylene ether, and 0.005 to 2 parts by weight of an organic carboxylic acid.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: July 4, 1989
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masahiro Niwano, Kenji Manabe