Patents by Inventor Todd W. Pechar

Todd W. Pechar 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).

  • Mixed matrix membranes
    Patent number: 7109140
    Abstract: Mixed matrix membranes are prepared from zeolites and polymers, such as polyimides, in a void free fashion where either no voids or voids of less than several Angstroms are present at the interface of the polymer and the zeolite by bonding (hydrogen, ionic, or covalent) functional groups on the zeolite with functional groups on the polymer. The mixed matrix membranes may be cast or formed by ISAM processes, and may be present on a variety of supports including hollow fibers.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: September 19, 2006
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Eva Marand, Todd W. Pechar, Michael Tsapatsis
  • Mixed matrix membranes
    Publication number: 20030220188
    Abstract: Mixed matrix membranes are prepared from zeolites and polymers, such as polyimides, in a void free fashion where either no voids or voids of less than several Angstroms are present at the interface of the polymer and the zeolite by bonding (hydrogen, ionic, or covalent) functional groups on the zeolite with functional groups on the polymer. The mixed matrix membranes may be cast or formed by ISAM processes, and may be present on a variety of supports including hollow fibers.
    Type: Application
    Filed: April 10, 2003
    Publication date: November 27, 2003
    Inventors: Eva Marand, Todd W. Pechar