Patents by Inventor Shoji Oishi

Shoji Oishi 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).

  • Processes for producing synthetic quartz powder and producing shaped quartz glass
    Patent number: 6129899
    Abstract: A process for producing a synthetic quartz powder, which comprises a step of heat-treating a silica gel powder while permitting it to flow in a rotary kiln.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: October 10, 2000
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoshio Katsuro, Masaru Shimoyama, Hiroshi Maeda, Shoji Oishi
  • Process for producing synthetic quartz glass powder
    Patent number: 6110852
    Abstract: A process for producing synthetic quartz powder which comprises calcining silica gel powder to produce a synthetic quartz glass powder, wherein dry air is used in the calcining process at least in the process of cooling from 800.degree. C. to 200.degree. C. This process enables efficient production of synthetic quartz glass powder on an industrial scale.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: August 29, 2000
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoshio Katsuro, Hozumi Endo, Akira Utsunomiya, Hiroaki Nagai, Toshifumi Yoshikawa, Shoji Oishi, Takashi Yamaguchi