Patents by Inventor Kazuo {overscore (O)}hara

Kazuo {overscore (O)}hara 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).

  • Luminous glass ceramics
    Patent number: 6204211
    Abstract: A luminous glass ceramic comprising a main crystallized phase of spinel or a solid solution of spinel including the components in weight %: SiO2 30-65 Al2O3  5-35 MgO  1-20 BaO 3-4 ZnO  5-35 TiO2  1-15 As2O3 + Sb2O3 0-3 wherein one or more rare earth elements are added to the glass ceramic in an amount of 0.1-30 wt %.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: March 20, 2001
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Kazuo {overscore (O)}hara, Satoru Matsumoto, Naoyuki Goto
  • Luminous glass ceramics
    Patent number: 6197710
    Abstract: A luminous glass ceramic comprising, in percent by weight, the following components: SiO2  50-65 (%) P2O5   0-10 Al2O3  18-30 Li2O   2-6 MgO 0.2-6 ZnO   0-2 CaO   0-4 BaO 0.5-6 TiO2   1-4 ZrO2   1-4 As2O3 + Sb2O3   0-2 wherein a total amount of SiO2 and P2O5 is 50-70 wt. %, a ratio of P2O5 to SiO2 is 0-0.18, a ratio of Al2O3 to SiO2 is 0.30-0.55, one or more rare earth elements are added to the glass ceramic on an oxide basis of 0.1-30 wt. % to an total amount of other components, Na2O component, K2O component, and PbO component are not essentially contained, and the glass ceramic has a thermal shock resistance |&Dgr;t|° C.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: March 6, 2001
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Kazuo {overscore (O)}hara, Satoru Matsumoto, Naoyuki Goto