Patents by Inventor Naoyoshi Kawamoto

Naoyoshi Kawamoto 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).

  • Transparent resin compositions with near infrared absorption characteristics
    Patent number: 6365654
    Abstract: This invention provides transparent resin compositions with excellent near infrared absorption characteristics comprising 100 parts by weight of a transparent thermoplastic resin, about 0.01 to about 2 parts by weight of a specific copper dithiocarbamate compound, and about 0 to about 2 parts by weight of a specific copper compound.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: April 2, 2002
    Assignee: Sumitomo Dow Limited
    Inventors: Yukio Tomari, Naoyoshi Kawamoto
  • Transparent resin compositions with near infrared absorption characteristics
    Publication number: 20020019468
    Abstract: This invention provides transparent resin compositions of polycarbonate, polyester, methacrylic, styrene, polyvinyl chloride, polyolefin, and polyamide resin, having the advantageous effects of efficiently absorbing near infrared radiation (780-1800 nm) and efficiently transmitting visible light (380-780 nm).
    Type: Application
    Filed: August 2, 2001
    Publication date: February 14, 2002
    Inventors: Yukio Tomari, Naoyoshi Kawamoto
  • Transparent resin compositions containing a thiuram compound and certain copper compounds
    Patent number: 6291585
    Abstract: This invention provides transparent resin compositions of polycarbonate, polyester, methacrylic, styrene, polyvinyl chloride, polyolefin, and polyamide resin, having the advantageous effects of efficiently absorbing near infrared radiation (780-1800 nm) and efficiently transmitting visible light (380-780 nm). The invention provides transparent resin compositions with excellent near infrared absorption characteristics comprising 100 parts by weight of a transparent thermoplastic resin, about 0.01 to about 2 parts by weight of a specific thiuram compound and/or a specific metal dithiocarbamate compound, and about 0.01 to about 2 parts by weight of a specific copper compound. It also provides transparent resin compositions with excellent near infrared absorption characteristics comprising 100 parts by weight of a transparent thermoplastic resin, about 0.01 to about 2 parts by weight of a specific copper dithiocarbamate compound, and about 0 to about 2 parts by weight of a specific copper compound.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: September 18, 2001
    Assignee: Sumitomo Dow Limited
    Inventors: Yukio Tomari, Naoyoshi Kawamoto
  • Ionizing radiation-resistant polycarbonate resin composition and medical part comprising same
    Patent number: 5807908
    Abstract: An ionizing radiation-resistant polycarbonate resin composition comprising 0.1 to 10 parts by weight of an organic compound having one carbon--carbon unsaturated double bond forming a non-bonding orbital in the molecule based on 100 parts by weight of a polycarbonate resin, and a medical part comprising the same. The polycarbonate resin composition and the medical part comprising the same exhibit less deterioration of color and physical properties even when irradiated with ionizing radiation for sterilization, and are, therefore, useful as a medical part material and a medical part.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: September 15, 1998
    Assignee: Sumitomo Dow Limited
    Inventors: Yoshikazu Hirose, Naoyoshi Kawamoto, Shigeharu Suzuki