Patents by Inventor Takaharu Hosokawa

Takaharu Hosokawa 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).

  • Glass for press molding
    Patent number: 7341967
    Abstract: The present invention provides a novel glass material that allows the production of a glass product having both excellent chemical durability and high precision by a press molding method. Specifically, the present invention provides a glass for press molding, comprising 38% to 45% by weight of SiO2, 18% to 27% by weight of B2O3, 16% to 25% by weight of Al2O3, 2% to 12% by weight of ZnO, no more than 3% by weight of MgO, no more than 3% by weight of CaO, no more than 3% by weight of BaO, 13% to 18% by weight of Li2O, no more than 3% by weight of K2O, and no more than 2% by weight of Na2O; wherein the glass has a deformation temperature of 520° C. or lower; and the glass has a water resistance of grade 2 or higher as measured according to the Japanese Optical Glass Industrial Standard method for measuring the chemical durability of an optical glass.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: March 11, 2008
    Assignees: Isuzu Glass Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Takaharu Hosokawa, Naoki Kikuchi, Tatsuya Suetsugu, Kazuhisa Kimura, Tadashi Hasegawa, Toshihiko Einishi, Takashi Tarumi, Kohei Kadono
  • Glass for press molding
    Publication number: 20070037685
    Abstract: The present invention provides a novel glass material that allows the production of a glass product having both excellent chemical durability and high precision by a press molding method. Specifically, the present invention provides a glass for press molding, comprising 38% to 45% by weight of SiO2, 18% to 27% by weight of B2O3, 16% to 25% by weight of Al2O3, 2% to 12% by weight of ZnO, no more than 3% by weight of MgO, no more than 3% by weight of CaO, no more than 3% by weight of BaO, 13% to 18% by weight of Li2O, no more than 3% by weight of K2O, and no more than 2% by weight of Na2O; wherein the glass has a deformation temperature of 520° C. or lower; and the glass has a water resistance of grade 2 or higher as measured according to the Japanese Optical Glass Industrial Standard method for measuring the chemical durability of an optical glass.
    Type: Application
    Filed: September 7, 2004
    Publication date: February 15, 2007
    Applicants: IZUZU GLASS CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE
    Inventors: Takaharu Hosokawa, Naoki Kikuchi, Tatsuya Suetsugu, Kazuhisa Kimura, Tadashi Hasegawa, Toshihiko Einishi, Takashi Tarumi, Kohei Kadono