Patents Examined by Stephen G. Kalichak
  • High-density vitreous carbon material and process for producing the same
    Patent number: 5152941
    Abstract: The present invention relates to a high-density vitreous carbon material having heat resistance, chemical resistance and no liquid and gas permeability, used in various industries, as well as to a process for producing said carbon material. More particularly, the present invention relates to a high-density vitreous carbon material having a sufficient thickness and a high density, as well as to a process for producing the same.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: October 6, 1992
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Akira Takaku, Toshimasa Hashimoto, Toshio Suzuki, Yutaka Takahashi, Kazuo Saito