Patents by Inventor Lawrence L. Kuo

Lawrence L. Kuo 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).

  • DEFOAMERS FOR HYDRATABLE CEMENTITIOUS COMPOSITIONS
    Publication number: 20110290158
    Abstract: The present invention discloses additive compositions, cementitious compositions, and methods for controlling air in cementitious compositions, wherein a polyalkoxylated polyalkylene polyamine defoamer is deployed in combination with one or more air-entraining agents, such as higher alkanolamines, water-reducing agents including oxyalkylene-containing superplasticizers, or other air entraining agents.
    Type: Application
    Filed: May 25, 2010
    Publication date: December 1, 2011
    Inventor: Lawrence L. Kuo
  • Cement admixture product having improved rheological properties and process of forming same
    Patent number: 5633298
    Abstract: The present invention is directed to an imidized polycarboxylic acid polymer useful as a cement admixture, to improved cement compositions containing said polymer and to a process of forming the same.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 27, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ahmad Arfaei, David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo
  • Allylamine copolymers having phosphonic, carboxylic or sulfonic groups and N-oxide derivatives thereof
    Patent number: 5629385
    Abstract: This invention is directed to certain novel N-functionalized polyallylamines having recurring units represented by the formula: ##STR1## wherein A, B, C and D are independently selected from the group consisting of hydrogen, CH.sub.2 PO.sub.3 H.sub.2, (CH.sub.2).sub.n COOH, (CH.sub.2).sub.m SO.sub.3 H and water-soluble salts thereof, wherein n=1 to 4, m=1 to 4, X is 1 to 99 mol %, Y is 1 to 99 mol % and X+Y=100 and with the proviso that when A is hydrogen, B is (CH.sub.2).sub.n COOH, or (CH.sub.2).sub.m SO.sub.3 H and at least one of C and D is CH.sub.2 PO.sub.3 H.sub.2 or (CH.sub.2).sub.m SO.sub.3 H, when A is (CH.sub.2).sub.n COOH, at least one of B, C and D is CH.sub.2 PO.sub.3 H.sub.2 or (CH.sub.2).sub.m SO.sub.3 H and when A is CH.sub.2 PO.sub.3 H.sub.2, at least one of B, C or D is (CH.sub.2).sub.n COOH or (CH.sub.2).sub.m SO.sub.3 H. The compositions of this invention are useful in water treatment to inhibit or remove scale deposits.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: May 13, 1997
    Assignee: BetzDearborn Inc.
    Inventor: Lawrence L. Kuo
  • Cement and cement composition having improved rheological properties
    Patent number: 5583183
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: December 10, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo
  • Water-soluble cationic copolymers and their use as flocculants
    Patent number: 5529699
    Abstract: A method of flocculating coagulated and/or finely divided suspended matter in aqueous systems comprising adding to the system from 0.005 to 1 weight percent based on the dry weight of the coagulated and/or finely suspended matter of at least one water soluble cationic polymer selected from a water soluble cationic copolymer (I) composed of the polymerization reaction of an N-vinylamide with at least one cationic quaternary amine monomer.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: June 25, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Roger Y. Leung, Kenneth S. Williams
  • Method of producing water-soluble cationic copolymers
    Patent number: 5516852
    Abstract: A method of preparing a high molecular weight water-soluble cationic copolymer by reacting in an aqueous solution at least one N-vinylamide and at least one cationic quaternary amine monomer in the presence of a free radical initiator and a salt of ethylenediamine tetraacetic acid and subjecting the formed polymer to an acid or base to form an N-vinylamide/N-vinylamine/cationic quaternary amine copolymer product.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: May 14, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Roger Y. Leung, Kenneth S. Williams
  • Water-soluble cationic copolymers and their use as drainage retention aids in papermaking processes
    Patent number: 5473033
    Abstract: A method of preparing paper or paper board product from an aqueous pulp suspension comprising adding to the suspension an effective amount of a drainage retention aid composition of a) microparticles and b) at least one water soluble cationic polymer selected from a water soluble cationic copolymer composed of the polymerization reaction of an N-vinylamide with at least one cationic quaternary amine monomer.The copolymers of this invention are useful as useful as drainage/retention aids in pulp and papermaking operations.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: December 5, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Roger Y. Leung, Kenneth S. Williams
  • Cement and cement composition having improved rheological properties
    Patent number: 5393343
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: February 28, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo