Patents by Inventor Duncan Ross Purvis

Duncan Ross Purvis 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).

  • Publication number: 20210023024
    Abstract: The invention concerns novel pharmaceutical compositions comprising 2, 4, 4?-trichloro-2?-hydroxydiphenylether (triclosan) and a thickener for use in the treatment of chronic wounds, in particular, in treatment of diabetic chronic wounds, such as foot ulcers.
    Type: Application
    Filed: April 4, 2019
    Publication date: January 28, 2021
    Inventors: Duncan Ross Purvis, Janette Ann Thomas, Brian Bennett, Celia Keeling
  • Patent number: 8404096
    Abstract: The invention relates to methods of preparation of highly sensitive potentiometric sensors with an electroconductive polymer film as a sensing element.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: March 26, 2013
    Assignee: Sensortec Limited
    Inventors: Duncan Ross Purvis, Olga Leonardova, Dmitri Alexandrovich Farmakovski, Vladimir Rurikovich Tcherkassov
  • Patent number: 8163163
    Abstract: A method of electrochemical analysis using a sensor electrode specific for an analyte under test. The method comprises immersing the sensor electrode in a sample solution suspected of containing the analyte; forming an electrochemically active complex by exposure to solutions containing secondary receptors or competing molecules labelled with a charged or enzyme label; and subsequently exposing the sensor to an electrochemically active solution. The measurement step comprises driving the sensor electrode potential to a predetermined fixed potential by applying a current or activation waveform then monitoring the potential difference between the sensor electrode and a reference electrode following removal of the holding current. Current, rate and potential can all be measured and used to determine analyte concentration or sensor state.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: April 24, 2012
    Assignee: Sensortec Limited
    Inventor: Duncan Ross Purvis
  • Publication number: 20080164154
    Abstract: A method of electrochemical analysis using a sensor electrode specific for an analyte under test. The method comprises immersing the sensor electrode in a sample solution suspected of containing the analyte; forming an electrochemically active complex by exposure to solutions containing secondary receptors or competing molecules labelled with a charged or enzyme label; and subsequently exposing the sensor to an electrochemically active solution. The measurement step comprises driving the sensor electrode potential to a predetermined fixed potential by applying a current or activation waveform then monitoring the potential difference between the sensor electrode and a reference electrode following removal of the holding current. Current, rate and potential can all be measured and used to determine analyte concentration or sensor state.
    Type: Application
    Filed: November 10, 2005
    Publication date: July 10, 2008
    Applicant: Sensortec Limited
    Inventor: Duncan Ross Purvis
  • Publication number: 20040182719
    Abstract: The invention relates to methods of preparation of highly sensitive potentiometric sensors with an electroconductive polymer film as a sensing element.
    Type: Application
    Filed: February 23, 2004
    Publication date: September 23, 2004
    Inventors: Duncan Ross Purvis, Olga Leonardova, Dmitri Alexandrovich Farmakovski, Vladimir Rurikovich Tcherkassov
  • Patent number: 6207423
    Abstract: This invention provides methods for denaturing nucleic acids. The methods involve contacting a solution comprising double stranded nucleic acid with a surface having denaturation activity sufficient to produce denaturation within a period of not more than one hour.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: March 27, 2001
    Assignee: Scientific Generics Limited
    Inventors: Duncan Ross Purvis, Philip Nigel Bartlett
  • Patent number: 5773587
    Abstract: Perfluorocarbon polymer-based matrices are coated with a hydrophilic polymer for use in bioaffinity separations. Coating is carried out by dispersing porous particles of inert perfluorocarbon polymer in a water-miscible organic solvent such as acetone or tetrafydrofuran to wet surfaces of the particles, forming a dispersion of the wetted particles in an aqueous solution of hydrophilic polymer such as poly(vinyl alcohol) containing a plurality of hydroxyl groups, at least one being at an end of a polymer chain, to adsorb the hydrophilic polymer onto the wetted surfaces of the particles, admixing a homobifunctional cross-linking agent such as glutaraldehyde with the particles to cross-link the hydrophilic polymer, activating hydroxyl groups on the surface of the cross-linked hydrophilic polymer and covalently bonding a ligand or ligand binder to the activated hydroxyl groups.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: June 30, 1998
    Assignee: DVC, Inc.
    Inventors: Christopher Robin Lowe, Norman A Parris, Ian Pitfield, Duncan Ross Purvis