Patents by Inventor K. Edward Lefren

K. Edward Lefren 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).

  • Recovery of elemental sulfur from gases
    Patent number: 5226934
    Abstract: A process for the separation of elemental sulfur from a gas comprises contacting the gas with molten sulfur whereby to extract the sulfur from the gas.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: July 13, 1993
    Assignee: University of Delaware
    Inventor: K. Edward Lefren