Patents by Inventor Dennis G. Pefiffer

Dennis G. Pefiffer 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).

  • Polymer-coated inorganic membrane for separating aromatic and aliphatic compounds
    Publication number: 20080035557
    Abstract: A membrane composition comprising an inorganic substrate which has a coating of an associating polymer. The membrane composition includes an inorganic substrate selected from the group consisting of a porous silica hollow tube, an alumina hollow tube and a ceramic monolith.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 14, 2008
    Inventors: Randall D. Partridge, Dennis G. Pefiffer, David C. Dalrymple, Walter Weissman