Patents by Inventor Dennis George Swartzfager

Dennis George Swartzfager 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).

  • Method for determining gas accumulation rates
    Patent number: 6598463
    Abstract: The Invention concerns an apparatus for and method for the simultaneous determination of permeation rate through and desorption rate from a polymeric specimen, the method comprising sealingly separating a first volume from a second volume with a specimen to be tested, said specimen being suffused with a first isotope of a gas or vapor; introducing in said first volume a second isotope of said gas or vapor, said second isotope being detectably distinguishable from said first isotope; in said second volume, adjusting the partial pressure of both said isotopes of said gas or vapor to a negligible value compared to that of said second isotope of said gas or vapor in said first volume; and, distinguishably detecting the concentration of each said diffusing isotope of said permeant in said second volume.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: July 29, 2003
    Inventors: Kenneth George Sharp, Dennis George Swartzfager, John Blase Zucaro
  • Method for determining gas accumulation rates
    Publication number: 20020162384
    Abstract: The Invention concerns an apparatus for and method for the simultaneous determination of permeation rate through and desorption rate from a polymeric specimen, the method comprising
    Type: Application
    Filed: April 22, 2002
    Publication date: November 7, 2002
    Inventors: Kenneth George Sharp, Dennis George Swartzfager, John Blase Zucaro