Patents by Inventor Dee J. Zerfoss

Dee J. Zerfoss 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).

  • Pipe flange system
    Patent number: 6601351
    Abstract: A pipe flange system for facilitating replacement of flashing around an electrical service entrance pipe on a roof. The pipe flange system includes a lower flange assembly for engaging a service entrance pipe which includes a lower base portion designed for resting upon a slant roof and a lower conical portion for engaging a portion of a perimeter wall of the service entrance pipe; and an upper flange assembly for engaging the service entrance pipe which includes an upper base portion designed for resting upon a slant roof and an upper surface of the lower flange assembly and an upper conical portion for engaging a second portion of the perimeter wall of the service entrance pipe.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: August 5, 2003
    Inventor: Dee J. Zerfoss