Patents by Inventor J. Derek Green

J. Derek Green 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).

  • Polymer activation apparatus
    Patent number: 5284627
    Abstract: Polymer activation apparatus for activating a liquid polymer emulsion in dilution water includes a first processing zone in which the polymer solution is subjected to a high mean shear rate for a predetermined period of time, and a second processing zone in which the polymer solution is subjected to a low mean shear rate for a longer period of time. The shear rates and residence times in the zones are selected to produce maximum activation in less total processing and aging time than that required in known apparatus.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: February 8, 1994
    Assignee: Stranco, Inc.
    Inventors: Carl L. Brazelton, Troy C. Litherland, J. Derek Green, Yong H. Kim
  • Polymer activation method using two separate mixing zones
    Patent number: 5252635
    Abstract: A polymer activation apparatus for activating and diluting a liquid polymer with water includes, a vessel defining a cylindrical chamber divided into first and second processing zones, the polymer and water being supplied to the first processing zone, an impeller located in the first processing zone subjecting the polymer to a high shear rate for a short contact time to initiate dissolution and activation of the polymer, and the polymer being moved to the second processing zone under the force of the water supplied to the first processing zone, a second impeller in the second processing zone subjecting the polymer to a lower shear rate for a longer period to continue the polymer dissolution and activation process.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: October 12, 1993
    Assignee: Stranco, Inc.
    Inventors: Carl L. Brazelton, Troy C. Litherland, J. Derek Green
  • Polymer activation apparatus
    Patent number: 5164429
    Abstract: Polymer activation apparatus for activating a liquid polymer emulsion in dilution water includes a first processing zone in which the polymer solution is subjected to a high mean shear rate for a predetermined period of time, and a second processing zone in which the polymer solution is subjected to a low mean shear rate for a longer period of time. The shear rates and residence times in the zones are selected to produce maximum activation in less total processing and aging time than that required in known apparatus.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: November 17, 1992
    Assignee: Stranco, Inc.
    Inventors: Carl L. Brazelton, Troy C. Litherland, J. Derek Green, Yong H. Kim
  • Polymer activation apparatus
    Patent number: 5061456
    Abstract: A polymer activation apparatus for activating and diluting a liquid polymer with water includes, a vessel defining a cylindrical chamber divided into first and second processing zones, the polymer and water being supplied to the first processing zone, an impeller located in the first processing zone subjecting the polymer to a high shear rate for a short contact time to initiate dissolution and activation of the polymer, and the polymer being moved to the second processing zone under the force of the water supplied to the first processing zone, a second impeller in the second processing zone subjecting the polymer to a lower shear rate for a longer period to continue the polymer dissolution and activation process.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: October 29, 1991
    Assignee: Stranco, Inc.
    Inventors: Carl L. Brazelton, Troy C. Litherland, J. Derek Green