Patents by Inventor Jim Dexter

Jim Dexter 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).

  • Roof environmental exhaust duct
    Patent number: 6206774
    Abstract: An environmental exhaust duct adapted to be mounted on a roof allows for exhaust gases to escape while preventing water and debris from entering the building. The exhaust duct has a flap which is closed over the duct by gravity, and which pivots upwards when exhaust gases are released. A cap over the duct prevents water and debris from entering the air shaft when the flap is open.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 27, 2001
    Inventors: Jim Dexter, Richard Weinman