Patents by Inventor John J. Bennison

John J. Bennison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Inhibition of deposition in aqueous systems
    Patent number: 5122278
    Abstract: A method for treating an aqueous system is disclosed which comprises incorporating therein a water soluble organic sulphonate copolymer and an optionally N-substituted water soluble copolymer of acrylamide or methacrylamide and a copolymerizable monomer.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: June 16, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Stuart W. Longworth, Brian Greaves, John J. Bennison
  • Method of controlling pitch using a cationically modified tannin
    Patent number: 4964952
    Abstract: A method of controlling pitch in an aqueous system involved in paper making as described which comprises adding a cationically modified tannin to the system.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: October 23, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: John J. Bennison, Richard P. Clifford
  • Treatment of aqueous systems
    Patent number: 4566972
    Abstract: A method of inhibiting and preventing scale in an aqueous system is described which comprises incorporating in the water at least one amino carboxylate having the formula:RN[--(CH.sub.2).sub.x --Z].sub.2in which x is 1 or 2, R represents --(CH.sub.2).sub.x --Z or --CH.sub.2 CH.sub.2 N[--(CH.sub.2).sub.x --Z].sub.2 and Z represents a --COOH group, or a salt thereof, and at least one water-soluble copolymer possessing recurring units of the formula: ##STR1## wherein R.sub.1 represents hydrogen, lower alkyl or --CH.sub.2 COOH, R.sub.2 represents hydrogen or lower alkyl, X represents --COOH and Z represents hydrogen or --COOH, or X and Z together represent --CO--O--CO--, and Y represents --SO.sub.3 H, --C.sub.6 H.sub.5 SO.sub.3 H (para) or --CONHQ(R.sub.3)(R.sub.4) SO.sub.3 H in which Q represents --CH.sub.2 -- or --CH.sub.2 --CH.sub.2 -- and R.sub.3 and R.sub.4 independently represent hydrogen, phenyl, substituted phenyl, C 1-12 linear or branched alkyl or C 3-12 cycloalkyl, or a salt thereof.
    Type: Grant
    Filed: January 15, 1985
    Date of Patent: January 28, 1986
    Assignee: Dearborn Chemicals, Ltd.
    Inventors: John J. Bennison, Stuart W. Longworth, John G. Baker
  • Treatment of aqueous systems
    Patent number: 4557896
    Abstract: Composition and method for inhibiting corrosion in aqueous systems using synergistic combination of an inorganic nitrite and a phosphonate, e.g., 10-20 ppm sodium nitrite plus 0.5-5 ppm hydroxyethylidene diphosphonic acid.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: December 10, 1985
    Assignee: Dearborn Chemicals Limited
    Inventors: Philip Brocklebank, John J. Bennison