Patents by Inventor Carrington Duane Smith

Carrington Duane Smith 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).

  • Patent number: 7097705
    Abstract: This invention provides water-based compositions, particularly coating, ink, adhesive, fountain solution and agricultural compositions, manifesting reduced equilibrium and dynamic surface tension by the incorporation of a surface tension reducing amount of a mixture of a non-fluorinated anionic compound and a non-fluorinated weak base cationic compound, the mixture demonstrating a dynamic surface tension (DST) which is less than the DST of the individual anionic and cationic compounds and less than 45 dynes/cm, at a concentration of ?5 wt % in water at 23° C. and 20 bubbles/second or less than 40 dynes/cm at a concentration of ?0.03M in water at 23° C. and 0.1 bubbles/second according to the maximum-bubble pressure method.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: August 29, 2006
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Carrington Duane Smith, Evelyn Jennifer Lin Paulsen, Peng Zhang, Robert Krantz Pinschmidt, Jr.
  • Patent number: 6756438
    Abstract: Aqueous based emulsion copolymers containing vinyl ethylene carbonate, vinyl acetate, and one or more other ethylenically unsaturated monomers, and aqueous based poly(vinyl alcohol)-containing emulsion copolymers formed by emulsion copolymerization of vinyl ethylene carbonate, vinyl acetate, and optionally one or more other ethylenically unsaturated monomer, in the presence of poly(vinyl alcohol). These emulsion copolymers can be used in a variety of applications such as adhesives and coatings.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: June 29, 2004
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John Joseph Rabasco, Carrington Duane Smith, Richard Henry Bott
  • Patent number: 6673862
    Abstract: The present invention provides for the production of stable aqueous dispersions of vinyl acetate-ethylene copolymers, preferably at high solids, i.e., greater than 65 wt %, preferably >70% which are useful as adhesives. The vinyl acetate-ethylene copolymer is comprised of polymerized units of vinyl acetate and ethylene in approximately 60-95 wt % and 5-40 wt % respectively. The copolymers are prepared by the emulsion copolymerization of vinyl acetate and ethylene monomers in the presence of a stabilizing system consisting essentially of (1) a poly(vinyl alcohol) which is 75-99+mole % hydrolyzed and has an average degree of polymerization ranging from 100-2200 and (2) a polyethylene glycol having a number average molecular weight of from 200 to 20,000.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: January 6, 2004
    Assignee: Air Products Polymers, L.P.
    Inventor: Carrington Duane Smith
  • Publication number: 20030162880
    Abstract: Aqueous based emulsion copolymers containing vinyl ethylene carbonate, vinyl acetate, and one or more other ethylenically unsaturated monomers, and aqueous based poly(vinyl alcohol)-containing emulsion copolymers formed by emulsion copolymerization of vinyl ethylene carbonate, vinyl acetate, and optionally one or more other ethylenically unsaturated monomer, in the presence of poly(vinyl alcohol). These emulsion copolymers can be used in a variety of applications such as adhesives and coatings.
    Type: Application
    Filed: February 14, 2003
    Publication date: August 28, 2003
    Inventors: John Joseph Rabasco, Carrington Duane Smith, Richard Henry Bott
  • Patent number: 6593412
    Abstract: Aqueous based emulsion copolymers containing vinyl ethylene carbonate, vinyl acetate, and one or more other ethylenically unsaturated monomers, and aqueous based poly(vinyl alcohol)-containing emulsion copolymers formed by emulsion copolymerization of vinyl ethylene carbonate, vinyl acetate, and optionally one or more other ethylenically unsaturated monomer, in the presence of poly(vinyl alcohol). These emulsion copolymers can be used in a variety of applications such as adhesives and coatings.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: July 15, 2003
    Assignee: Air Products Polymers, L.P.
    Inventors: John Joseph Rabasco, Carrington Duane Smith, Richard Henry Bott
  • Publication number: 20030032698
    Abstract: This invention provides water-based compositions, particularly coating, ink, adhesive, fountain solution and agricultural compositions, manifesting reduced equilibrium and dynamic surface tension by the incorporation of a surface tension reducing amount of a mixture of a non-fluorinated anionic compound and a non-fluorinated weak base cationic compound, the mixture demonstrating a dynamic surface tension (DST) which is less than the DST of the individual anionic and cationic compounds and less than 45 dynes/cm, at a concentration of ≦5 wt % in water at 23° C. and 20 bubbles/second or less than 40 dynes/cm at a concentration of ≦0.03M in water at 23° C. and 0.1 bubbles/second according to the maximum-bubble pressure method.
    Type: Application
    Filed: March 29, 2002
    Publication date: February 13, 2003
    Inventors: Carrington Duane Smith, Evelyn Jennifer Lin Paulsen, Peng Zhang, Robert Krantz Pinschmidt
  • Patent number: 6218455
    Abstract: This invention relates to improved vinyl acetate/ethylene copolymers emulsions polymerized in the presence of colloidal, nonionic, water dispersible polyurethanes. The improvement resides in polymerizing the vinyl acetate and ethylene in the presence of a costabilizer comprised of the colloidal, nonionic, water dispersible polyurethanes and a polyoxyethylene-polyalkylene glycol, a particularly polyoxyethylene-polyoxypropylene glycols.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: April 17, 2001
    Assignee: Air Products Polymers, L.P.
    Inventors: Carrington Duane Smith, Robert James Klein
  • Patent number: 6124397
    Abstract: This invention relates to improved vinyl acetate-based polymers which are formed by emulsion polymerizing vinyl acetate and other comonomers under conditions of free radical polymerization. The improvement resides in the stabilizer system, the stabilizer being a condensation product of a polyol having a weight average molecular weight of from 500 to 10,000 reacted with a diepoxide. An example is the reaction product of polyethylene glycol and the diglycidyl ether of Bisphenol A.
    Type: Grant
    Filed: February 24, 1998
    Date of Patent: September 26, 2000
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Carrington Duane Smith
  • Patent number: 5733964
    Abstract: Heterogeneous polymer mixtures comprising a polymer in liquid or supercritical CO.sub.2 are stabilized by employing a poly(propylene oxide) or poly(butylene oxide) based surfactant. These surfactants are especially well suited for stabilizing heterogeneous polymer mixtures formed by micronizing techniques as well as by precipitation of a compressed fluid antisolvent applications.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: March 31, 1998
    Assignees: Board of Regents, The University of Texas System, Air Products and Chemicals, Inc.
    Inventors: Keith P. Johnston, Steven Paul Wilkinson, Mark Leonard O'Neill, Lloyd Mahlon Robeson, Simon Mawson, Richard Henry Bott, Carrington Duane Smith