Patents Represented by Attorney Jack Wasatonic

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  • Sprayable fireproofing composition
    Patent number: 4981521
    Abstract: Fire retardant coatings for metal structural members are obtained by spraying onto the structural members settable plaster compositions which are air-containing pumpable aqueous slurries of plaster, clay prill aggregate, cellulose and glass fiber reinforcement and foaming agent. The specially prepared clay prill aggregate has a low aspect ratio of near unity and is an acceptable substitute for the exfoliated vermiculite aggregate of prior coating compositions.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: January 1, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert J. Bettacchi, Mary Driscoll, Dennis M. Hilton