Patents by Inventor Takao Koya

Takao Koya 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).

  • Ultraviolet-and infrared-ray absorbing polymer composition
    Patent number: 5604281
    Abstract: The ultraviolet- and infrared-ray absorbing polymer composition contains 0.01-1 part by weight of an organic ultraviolet-ray absorbent and 0.001-2 parts by weight of an organic infrared-ray absorbent onto 100 parts by weight of a polycarbonate resin which implies 10-100% by weight of copolyestercarbonate, manufactured by heat-molding process at 210.degree.-245.degree. C. from a mixture of those components. This polymer composition is manufactured easily by an ordinary screw extruder or injection molding machine without strict control of heat-molding temperature, at a high non-defective ratio, said product having a stable effect in absorbing ultraviolet rays and infrared rays, while allowing transmittance of visible radiation rays, thus making it suitable for a wide variety of uses.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: February 18, 1997
    Assignee: The Japan Carlit Co., Ltd.
    Inventors: Teruaki Kamei, Takao Koya, Masaaki Tamura, Emiko Iwata, Syuko Shindo