Patents by Inventor Howard Wayne Hall

Howard Wayne Hall 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).

  • Gas service riser assembly and ductile pipe to plastic pipe transition connection
    Patent number: 6896297
    Abstract: A gas service riser assembly and ductile pipe to plastic pipe transition connection is provided. The gas service riser assembly comprises an outer ductile pipe, a plastic pipe having open ends disposed within the outer ductile pipe and extending through one end thereof, a hollow rigid stiffener disposed within the interior of a portion of the plastic pipe within the outer ductile pipe, a gasket positioned around the exterior of the plastic pipe adjacent to the stiffener, and a crimp formed in the outer ductile pipe adjacent to the stiffener and the gasket whereby the outer ductile pipe is compressed against the gasket, plastic pipe and the stiffener to form a seal.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: May 24, 2005
    Assignee: Central Plastics Company
    Inventor: Howard Wayne Hall