Patents by Inventor Masataro Okumiya

Masataro Okumiya 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).

  • Low thermal expansion cordierite aggregate and its bonded body
    Patent number: 5607885
    Abstract: A low thermal expansion cordierite aggregate, which consists mainly of cordierite crystals having a mean crystal diameter of at least 50 .mu.m and has little orientation in the crystal structure, shows hysteresis in its thermal expansion property accompanying a rise and fall of the temperature, and has a mean thermal expansion coefficient within a temperature range of from room temperature to 1000.degree. C. of at most 10.times.10.sup.-7 /.degree.C.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: March 4, 1997
    Assignee: AG Technology Co., Ltd.
    Inventors: Tomoko Ichii, Keiichiro Suzuki, Masataro Okumiya
  • Low thermal expansion cordierite aggregate and its bonded body
    Patent number: 5552349
    Abstract: A low thermal expansion cordierite aggregate, which consists mainly of cordierite crystals having a mean crystal diameter of at least 50 .mu.m and has little orientation in the crystal structure, shows hysteresis in its thermal expansion property accompanying a rise and fall of the temperature, and has a mean thermal expansion coefficient within a temperature range of from room temperature to 1000.degree. C. of at most 10.times.10.sup.-7 /.degree.C.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: September 3, 1996
    Assignee: AG Technology Co., Ltd.
    Inventors: Tomoko Ichii, Keiichiro Suzuki, Masataro Okumiya
  • High zirconia fused refractory product
    Patent number: 4336339
    Abstract: A high zirconia fused refractory product consists essentially of the following constituents analytically, on a weight basis:85% to 97% of ZrO.sub.2 ;0.1% to 3% of P.sub.2 O.sub.5 ;2% to 10% of SiO.sub.2 ;up to 3% of Al.sub.2 O.sub.3without a substantial amount of a rare earth oxide.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: June 22, 1982
    Assignee: Asahi Glass Company Ltd.
    Inventors: Masataro Okumiya, Kiyoharu Kuwabara
  • Heat fused refractory product containing zirconia having high corrosion resistance
    Patent number: 4053321
    Abstract: A ZrO.sub.2 -Al.sub.2 O.sub.3 -SiO.sub.2 type heat fused refractory product comprises 40 to 70 wt.% of ZrO.sub.2 + SnO.sub.2 ; 10 to 58 wt.% of Al.sub.2 O.sub.3 + Cr.sub.2 O.sub.3 and 2 to 20 wt.% of SiO.sub.2 wherein the content of alkali metal oxide is less than that of SiO.sub.2 ; the content of SnO.sub.2 is more than that of SiO.sub.2 ; and the content of ZrO.sub.2 is more than that of SnO.sub.2.The heat fused refractory product containing zirconia has excellent corrosion resistance and low expansion characteristics.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: October 11, 1977
    Assignee: Asahi Glass Company Ltd.
    Inventors: Masataro Okumiya, Takuro Ono