Patents by Inventor Gerald D. Dupre

Gerald D. Dupre 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 of producing molecular profiles of isoparaffins by low emitter current field ionization mass spectrometry
    Patent number: 7671328
    Abstract: The present invention is devoted to an analytical method for directly determining carbon number and molecular weight distributions of isoparaffin mixtures. The analytical means uses low in-scan emitter-current field-ionization mass spectroscopy to substantially reduced or eliminated molecular ion fragmentation for isoparaffins, which allows direct measurement of isoparaffin molecular ions for their distributions. The analytical means is capable of directly characterizing isobutane to C50+ isoparaffins, covering naphtha to gas oil ranges.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: March 2, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Chang Samuel Hsu, Gary J Dechert, Haven S. Aldrich, Gerald D. Dupre
  • Deep desulfurization of distillate fuels
    Patent number: 5454933
    Abstract: A process for providing distillate products which are substantially sulfur free, which process comprises subjecting a distillate stream to conventional hydrodesulfurization conditions including a catalyst comprised of a Group VI metal and at least one Group VIII metal on a refractory support. The hydrodesulfurized stream is then treated with a solid adsorbent material capable of adsorbing beta and di-beta-substituted dibenzothiophene sulfur compounds.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: October 3, 1995
    Assignee: Exxon Research and Engineering Company
    Inventors: David W. Savage, Bal K. Kaul, Gerald D. Dupre, Joseph T. O'Bara, William E. Wales, Teh C. Ho