Patents by Inventor Glenn F. Leverett

Glenn F. Leverett 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).

  • Extractive distillation
    Patent number: 5049241
    Abstract: Process of separating hydrogen chloride and tetrafluoroethylene by extractively distilling a mixture thereof in the presence of an extractant that substantially alters the relative volatilities of the hydrogen chloride and the tetrafluoroethylene, for example, a perhalogenated organic extractant, such as perfluorocyclobutane, hexafluoropropylene or 1,1,2-trifluoro-1,2,2-trichloroethane.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: September 17, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn F. Leverett, Jan Wit