Patents by Inventor Hidekazu Nakatani

Hidekazu Nakatani 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).

  • Polycarbonate resin
    Patent number: 6576735
    Abstract: A polycarbonate resin obtainable by reaction of a carbonic acid ester-forming compound with bisphenols consisting essentially of 9,9-bis(4-hydroxy-3-methylphenyl) fluorene and a bisphenol compound(s) having a polysiloxane skeleton, an intrinsic viscosity of said polycarbonate resin being 0.2 to 2.0 dl/g.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: June 10, 2003
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tatsuya Kanagawa, Noriyoshi Ogawa, Hidekazu Nakatani, Noriaki Honda, Mitsuhiko Masumoto
  • Polycarbonate resin
    Publication number: 20020061997
    Abstract: A polycarbonate resin obtainable by reaction of a carbonic acid ester-forming compound with bisphenols consisting essentially of 9,9-bis (4-hydroxy-3-methylphenyl) fluorene and a bisphenol compound(s) having a polysiloxane skeleton, an intrinsic viscosity of said polycarbonate resin being 0.2 to 2.0 dl/g.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 23, 2002
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Tatsuya Kanagawa, Noriyoshi Ogawa, Hidekazu Nakatani, Noriaki Honda, Mitsuhiko Masumoto
  • Polycarbonate resin and optical article used the same
    Patent number: 6340737
    Abstract: A polycarbonate resin obtained by reaction of (A) a bisphenol compound having a fluorene structure, (B) a bisphenol compound having a polysiloxane structure, (C) other specific bisphenol compound and a carbonic acid ester-forming compound, wherein an amount of (A) bisphenol compound is 30 to 80% by weight to total amount of (A) bisphenol compound and (B) bisphenol compound, and an amount of (C) bisphenol compound is 1 to 80% by weight to total amount of (A) bisphenol compound, (B) bisphenol compound and (C) bisphenol compound, and an intrinsic viscosity of said polycarbonate resin is 0.2 to 1.0 dl/g.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: January 22, 2002
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Noriyoshi Ogawa, Tatsuya Kanagawa, Hidekazu Nakatani
  • Polycarbonate resin and optical article used the same
    Publication number: 20010039313
    Abstract: A polycarbonate resin obtained by reaction of (A) a bisphenol compound having a fluorene structure, (B) a bisphenol compound having a polysiloxane structure, (C) other specific bisphenol compound and a carbonic acid ester-forming compound, wherein an amount of (A) bisphenol compound is 30 to 80% by weight to total amount of (A) bisphenol compound and (B) bisphenol compound,and an amount of (C) bisphenol compound is 1 to 80% by weight to total amount of (A) bisphenol compound, (B) bisphenol compound and (C) bisphenol compound and an intrinsic viscosity of said polycarbonate resin is 0.2 to 1.0 dl/g.
    Type: Application
    Filed: March 29, 2001
    Publication date: November 8, 2001
    Inventors: Noriyoshi Ogawa, Tatsuya Kanagawa, Hidekazu Nakatani