Patents Assigned to Norton GmbH
  • Refractory material and process for production of the same
    Patent number: 4990469
    Abstract: The present invention relates to a refractory material which consists of 63 to 82 weight percent of SiC, 15 to 27 weight percent of Si.sub.3 N.sub.4 and 3 to 10 weight percent of inorganic oxides.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: February 5, 1991
    Assignee: Norton GmbH
    Inventors: Michel Dussaulx, Francisco Lorenzo