Patents by Inventor Michael D. Dugger

Michael D. Dugger 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).

  • Vapor collection assembly for fuel dispensing nozzle
    Patent number: 5129432
    Abstract: A fuel dispensing nozzle assembly is disclosed for adapting a conventional gasoline pump dispensing nozzle to perform as a Stage II vapor recovery system by effectively collecting the vapors forced out the vehicle fuel tank during a refueling operation. The assembly permits the pump dispensing gun to form a seal with the rim of a vehicle's fill pipe, with operator assistance, to prevent the vapors from escaping into the environment by collecting the vapors within the nozzle assembly, and routing the vapors to a collection tank.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: July 14, 1992
    Inventor: Michael D. Dugger
  • Method for underground storage tank abandonment
    Patent number: 4693284
    Abstract: An underground storage tank is treated in an expeditious, safe, and environmentally acceptable manner for the purpose of abandonment in place whereby the tank may not be re-used for its intended purpose which treatment involves completely filling the interior of the storage tank with a rigid polyurethane foam.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: September 15, 1987
    Assignee: Petro Fill, Inc.
    Inventor: Michael D. Dugger