Patents by Inventor George Lukaszewicz

George Lukaszewicz 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).

  • Drainage seal for sewage system
    Patent number: 4476603
    Abstract: To facilitate cleanout of a sewer a guide member is located with a manhole to guide a cleanout tool into the sewer. The sewer is downwardly inclined adjacent the manhole so that the inlet enters at a location below the outlet and a predetermined level of liquid is maintained in the manhole. The guide member comprises a base with a pair of upstanding wings that project above the predetermined level to present a pair of guide members for the insertion of the cleanout tool.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: October 16, 1984
    Assignee: Shell Canada Limited
    Inventor: George Lukaszewicz