Patents by Inventor John S. Crnko

John S. Crnko 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: 7291203
    Abstract: A method is disclosed for performing GC separations using a separation protocol including at least one negative temperature ramp, where the negative temperature ramp is controlled either by the introduction of a gaseous coolant at a controlled and adjustable rate or by the introduction of the coolant along with the application of microwave radiation to a column capable of absorbing microwave radiation, where the rate of coolant introduction or the rate of coolant introduction and radiation introduction is sufficient to achieve a desired rate of cooling.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: November 6, 2007
    Assignee: Petroleum Ana Ryzes Company LP
    Inventors: John S. Crnko, Scott K. Warren