Patents by Inventor David E. Purcell

David E. Purcell 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).

  • Moisture and vapor barrier in exterior insulation finish systems
    Patent number: 5027572
    Abstract: A new concept wall system is provided, wherein a moisture and vapor barrier is positioned in an enterior insulation finish system to provide thermal stability regardless of climatic variations. Specifically, a two part membrane of multiple cross-laminated layers of polyethylene film fully bonded to a layer of rubberized asphalt is placed between the substrate and insulation layers of the exterior insulation finish system.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: July 2, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David E. Purcell, Lawrence Shapiro