Patents by Inventor Ryuji Uchimura

Ryuji Uchimura 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).

  • Patent number: 6875491
    Abstract: A polycarbonate composition excellent in both antistatic property and coloring matter coatability containing (a) a polycarbonate obtained by an ester exchange process, and (b) a compound having a molecular weight of from 300 to 8,000 and having any of ester bond, carbonate bond, amide bond and urethane bond in its molecule and an aromatic hydrocarbon group substituted by at least one alkyl group at the molecular end thereof, a write once read many optical disc substrate and a write once read many optical disc using the same and a process for the production of a write once read many optical disc are described.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: April 5, 2005
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaaki Miyamoto, Takao Tayama, Ryuji Uchimura, Toshimitsu Inoue, Shigeo Higashi, Masaya Ueda
  • Publication number: 20030153720
    Abstract: A polycarbonate composition excellent in both antistatic property and coloring matter coatability containing (a) a polycarbonate obtained by an ester exchange process, and (b) a compound having a molecular weight of from 300 to 8,000 and having any of ester bond, carbonate bond, amide bond and urethane bond in its molecule and an aromatic hydrocarbon group substituted by at least one alkyl group at the molecular end thereof, a write once read many optical disc substrate and a write once read many optical disc using the same and a process for the production of a write once read many optical disc are described.
    Type: Application
    Filed: October 22, 2002
    Publication date: August 14, 2003
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masaaki Miyamoto, Takao Tayama, Ryuji Uchimura, Toshimitsu Inoue, Shigeo Higashi, Masaya Ueda
  • Patent number: 6294641
    Abstract: A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: September 25, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaaki Miyamoto, Motonori Ueda, Kiyoji Kuma, Ryuji Uchimura, Yoshitaka Shiraishi
  • Patent number: 6288205
    Abstract: A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: September 11, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaaki Miyamoto, Motonori Ueda, Kiyoji Kuma, Ryuji Uchimura, Yoshitaka Shiraishi, Toshimitsu Inoue