Patents by Inventor David E. Zimmer

David E. Zimmer 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).

  • Composite building module
    Patent number: 4252767
    Abstract: A monolithic-like, composite building module such as a wall panel having a core of rigid foam encased in a shell made of fiber reinforced cement. The composite module can be made by forming a supported open shell made of a hardened mixture of cement and fibers, introducing a rigid foamable polymer into the open shell, closing the open shell with a cover member made of a hardened mixture of cement and glass fibers and thereafter holding the cover member in place while polymer foam fills the interior of the enclosed shell.
    Type: Grant
    Filed: June 17, 1975
    Date of Patent: February 24, 1981
    Assignee: Daniel Zimmer
    Inventors: Matthew R. Piazza, David E. Zimmer