Patents by Inventor Gerry E. McPherson

Gerry E. McPherson 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).

  • Apparatus and method for forming water stops on insulated pipe
    Patent number: 4041198
    Abstract: Apparatus usable in combination with means for extruding a waterproof plastic sheath on foam coating on the exterior of pipe, for reducing the diameter of the plastic sheath adjacent the pipe section ends to conform to the beveled end surfaces of the foam coating and adjacent protruding marginal portions of the pipe surface and thereby form a water stop excluding moisture from the foam thus enclosed by the plastic sheath.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: August 9, 1977
    Assignee: General Steel Industries, Inc.
    Inventor: Gerry E. McPherson