Patents by Inventor Takanori Nakazato

Takanori Nakazato 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).

  • Maleimide-based copolymer and resin composition comprising the same
    Patent number: 5948879
    Abstract: A maleimide-based copolymer containing maleimide monomer units (a-1), aromatic vinyl monomer units (a-2) and other vinyl monomer units (a-3), wherein,(I) the content of residual maleimide monomer in the copolymer is 0.1% by weight or less, and the content of whole volatiles other than the maleimide monomer is 0.5% by weight or less;(II) a compound obtained from at least one monomer selected from the group consisting of a maleimide monomer, an aromatic vinyl monomer and other vinyl monomers, having a weight-average molecular weight of from 200 to 1,000, is contained in an amount of 2 to 10% by weight;(III) the copolymer has a yellow index of 30 or less; and(IV) the copolymer has an intrinsic viscosity of from 0.3 to 1.5.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: September 7, 1999
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroshi Mori, Yasuaki Ii, Hisaya Yokohama, Yasunori Tsuneshige, Seizo Fujii, Takanori Nakazato