Patents by Inventor Donald W. Patrick

Donald W. Patrick 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 FOR RHEOLOGICAL TESTING OF MULTIPLE SAMPLES AND SYSTEMS THEREFOR
    Publication number: 20100139374
    Abstract: The viscosity or relative viscosity of samples can be measured in parallel by dispensing or aspirating the samples at a set condition and then measuring a property of the sample such as mass dispensed or aspirated.
    Type: Application
    Filed: December 3, 2009
    Publication date: June 10, 2010
    Inventors: Daniel L. Dermody, Suraj S. Deshmukh, Matthew T. Bishop, Drew A. Davidock, J. Keith Harris, Tzu-Chi Kuo, Paul L. Morabito, Melissa A. Mushrush, Donald W. Patrick, Jonathan J. Zieman
  • Pressure programmable gas chromatograph regulator
    Patent number: 5163979
    Abstract: A pressure control apparatus includes an oscillating electronic back pressure regulator connected to a pneumatic or diaphragm-operated back pressure regulator. These are connected to a separation column for effecting a predetermined program of pressure change and thereby improving quantitation of results as well as service life of the regulator.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: November 17, 1992
    Assignee: The Dow Chemical Company
    Inventors: Donald W. Patrick, Richard A. Wolcott