Patents by Inventor Tomoko Ichii

Tomoko Ichii 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