Patents by Inventor James Henry Barrett

James Henry Barrett 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).

  • Method for removal of arsenic from water
    Patent number: 7282153
    Abstract: A method for removing arsenic from water by contacting water with a strong base anion exchange resin comprising at least one metal ion or metal-containing ion whose arsenate salt has a Ksp no greater than 10?5, provided that the metal is not zirconium.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: October 16, 2007
    Assignee: Rohm and Haas Company
    Inventors: James Henry Barrett, Jose Antonio Trejo
  • Solid media
    Patent number: 6867275
    Abstract: Solid media useful for a variety of applications, such as separations, catalysis, drug carriers, sensors, and combinatorial chemistry, are disclosed. The solid media are prepared with PNPs having a diameter of 1 to 50 nanometers, the PNPs including as polymerized units a multi-ethylenically-unsaturated monomer. Also provided are methods for preparing the solid media.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: March 15, 2005
    Assignee: Rohm and Haas Company
    Inventors: James Nelson Alexander, IV, James Henry Barrett, Richard John Piccolini, Robert Howard Gore, Carlos Alfonso Cruz, Biwang Jiang, Eric Gustave Lundquist, Warren Harvey Machleder, Newman Mayer Bortnick
  • High selectivity perchlorate removal resins and methods and systems using same
    Publication number: 20040256597
    Abstract: The present invention relates to a resin for removal of perchlorate, methods for manufacturing the resin, and methods and systems using the resin. The resin has a high selectivity coefficient. Given the performance properties of the resin, an economical method of servicing a water treatment system is also provided. The method includes loading into and/or unloading from the water treatment system a perchlorate removal resin having the high selectivity coefficient. In one aspect, the perchlorate removal resin has quaternary alkylamine functionality. In another variant, the resin is capable of removing at least two times the amount of perchlorate per cubic meter of the resin than a conventional perchlorate removal resin. This provides substantial commercial benefits to users.
    Type: Application
    Filed: April 26, 2004
    Publication date: December 23, 2004
    Inventors: James Henry Barrett, Eric Gustave Lundquist, Jay Alfred Miers, Margaret Mary Pafford, William Harris Carlin
  • Solid media
    Publication number: 20020177522
    Abstract: Solid media useful for a variety of applications, such as separations, catalysis, drug carriers, sensors, and combinatorial chemistry, are disclosed. The solid media are prepared with PNPs having a diameter of 1 to 50 nanometers, the PNPs including as polymerized units a multi-ethylenically-unsaturated monomer. Also provided are methods for preparing the solid media.
    Type: Application
    Filed: March 15, 2002
    Publication date: November 28, 2002
    Inventors: James Nelson Alexander, James Henry Barrett, Richard John Piccolini, Robert Howard Gore, Carlos Alfonso Cruz, Biwang Jiang, Eric Gustave Lundquist, Warren Harvey Machleder, Newman Mayer Bortnick
  • Method of decolorizing sugar solutions with hybrid ion exchange resins
    Patent number: 3966489
    Abstract: Hybrid copolymers are prepared by at least partially filling the voids of a macroreticular copolymer with a gel-type, cross-linked copolymer of either the same monomers or a copolymer of different type monomers. The hybrid copolymers can be readily converted into ion exchange resins. Such resins have markedly improved physical and chemical properties, including improved ion exchange properties. Such resins are also especially useful for decolorizing sugar solutions.
    Type: Grant
    Filed: December 21, 1973
    Date of Patent: June 29, 1976
    Assignee: Rohm and Haas Company
    Inventors: James Henry Barrett, David Henry Clemens