Patents Represented by Law Firm Senniger, Powers, Leavitt and Roede
  • Sprayable plastic refractory
    Patent number: 4952534
    Abstract: A gunnable plastic refractory is made by adding a hydrocolloid, for example a polysaccharide ether such as methylcellulose, to the refractory composition and adjusting the moisture content to be from about 4% to about 10%. The workability index of the refractory mix is from about 8% to about 30%. The refractory can be gunned without stoppages caused by clogging of hoses and the rebound rate is low.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: August 28, 1990
    Assignee: A. P. Green Industries, Inc.
    Inventors: Allen R. Davis, Elbert A. Willis