Patents Examined by Hollenbeck, Sue E.
  • Process for the production of glass
    Patent number: 4871695
    Abstract: A process for the production of a glass by the vacuum melting method using silica as a raw material is disclosed, comprising filing a silica fine powder in a suitable vessel, heating it in the presence of an accelerator for phase conversion to obtain a porous formed body consisting of a cristobalite phase, and then heating and melting the formed body in vacuo. According to the present invention, a transparent and active glass having a high quality can be produced at an inexpensive cost.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: October 3, 1989
    Assignee: Japan Oxygen Co., Ltd.
    Inventors: Koji Seki, Hiroshi Morishita, Kiyoshi Ohno, Hiroshi Yokota