Patents by Inventor Stephen J. O'Donohue

Stephen J. O'Donohue 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: 7716969
    Abstract: A method and apparatus for continuously extracting liquid in at least two separate streams from a vessel, continuously diluting and/or conditioning a first stream in one or more stages, producing, as a result of the extraction, dilution and/or conditioning, the first stream consisting of a dispersion of particles to be characterized, and diluting and/or conditioning a second stream, the second stream consisting of soluble components; and subjecting the first and second streams to various characterizing measurements.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: May 18, 2010
    Assignees: The Administrators of the Tulane Educational Fund, Polymer Laboratories Ltd.
    Inventors: Wayne F. Reed, Alina M. Alb, Stephen J. O'Donohue, Robert M. Anderson
  • Publication number: 20080216563
    Abstract: A method and apparatus for continuously extracting liquid in at least two separate streams from a vessel, continuously diluting and/or conditioning a first stream in one or more stages, producing, as a result of the extraction, dilution and/or conditioning, the first stream consisting of a dispersion of particles to be characterized, and diluting and/or conditioning a second stream, the second stream consisting of soluble components; and subjecting the first and second streams to various characterizing measurements.
    Type: Application
    Filed: October 1, 2007
    Publication date: September 11, 2008
    Inventors: Wayne F. REED, Alina M. Alb, Stephen J. O'Donohue, Robert M. Anderson
  • Patent number: 6151113
    Abstract: An evaporative light scattering detector (1) has a solvent nebuliser (4) through which an atomised spray of solute solvent solution passes, a heated evaporation chamber (5) and a detector system (6). A diffuser trapping device (7), supported by fine wires, is positioned in the evaporation chamber (5) at about two fifths of the height of the chamber from the top. The diffuser trapping device (7) is made from randomly coiled stainless steel ribbon which gives it a large surface area. The detection system (6) is positioned at the bottom of the evaporation chamber through which a beam of collimated light passes and is scattered by the solvent and detected by a light sensitive device (14). The diffuser trapping device (7) aids evaporation of the solvent and prevents large particles from travelling further down the evaporation chamber (5).
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: November 21, 2000
    Assignee: Polymer Laboratories Limited
    Inventors: Stephen J O'Donohue, Frank P Warner
  • Patent number: 6122055
    Abstract: An evaporative light scattering detector (1) has a solvent nebulizer (4) through which an atomised spray of solute solvent solution passes, a heated evaporation chamber (5) and a detector system (6). A diffuser trapping device (7), supported by fine wires, is positioned in the evaporation chamber(5) at about two fifths of the height of the chamber from the top. The diffuser trapping device (7) is made from randomly coiled stainless steel ribbon which gives it a large surface area. The detection system (6) is positioned at the bottom of the evaporation chamber through which a beam of collimated light passes and is scattered by the solvent and detected by a light sensitive device (14). The diffuser trapping device (7) aids evaporation of the solvent and prevents large particles from travelling further down the evaporation chamber (5).
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: September 19, 2000
    Assignee: Polymer Laboratories Limited
    Inventors: Stephen J O'Donohue, Frank P. Warner, Paul Claes, Nathan Wrench