Patents by Inventor Barry J. Woodhams

Barry J. Woodhams 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).

  • Calibrator for prothrombin time (PT) assays
    Patent number: 5866425
    Abstract: This invention pertains to a PT Assay Calibrator and a method of preparing a PT Assay Calibrator including a coagulation factor such as recombinant FVII or recombinant FVIIa that will allow preparation of PT calibration curves with values about 100% and which will give results analogous to those obtained using fresh normal plasma.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: February 2, 1999
    Assignee: Dade AG
    Inventors: Barry J. Woodhams, Michael E. Burgess-Wilson
  • Protein S chromogenic assay
    Patent number: 5308756
    Abstract: A chromogenic assay for determination of Protein S, using an indicator of Factor Xa as a measure of Protein S concentration. This technique utilizes the dependency of activated Protein C on Protein S in order to inactivate a known portion of Factor VIII. Residual Factor VIII is then activated and acts with Factor IXa to activate Factor X. The chromogenic substrate is then cleaved by Factor Xa and the rate of conversion of the indicator molecule is an indirect indicator of free Protein S.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: May 3, 1994
    Assignee: Baxter Diagnostics Inc.
    Inventors: Piet van de Waart, Barry J. Woodhams