Patents by Inventor Duncan R. Purvis

Duncan R. 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).

  • Methods of analysis/separation
    Patent number: 6310309
    Abstract: Particles are separated according to their dielectrophoretic characteristics and electrorotation characteristics by the use of a travelling wave separation in which they flow from a departure point at an inlet (18) towards at least two destinations at outlets (16, 20) and are deflected toward one or other outlet according to their characteristics by a travelling wave field set up on an array of electrodes, each electrode running generally in the direction of flow.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: October 30, 2001
    Assignee: Scientific Generics Limited
    Inventors: Colin D. Ager, Andrew N. Dames, Duncan R. Purvis, Nicholas A. Safford
  • Electrochemical denaturation of double-stranded nucleic acid
    Patent number: 6291185
    Abstract: Double stranded nucleic acid is denatured by subjecting a solution thereof to a voltage applied between electrodes spaced by no more than 1.5 mm in a time not previously achievable in electrochemical denaturation. PCR is practised isothermally by periodic application of voltage to produce denaturation. Electrochemical cells and kits for use in the process are provided.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: September 18, 2001
    Assignee: Affymetrix, Inc.
    Inventor: Duncan R. Purvis