Patents by Inventor John R. Allen

John R. Allen 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).

  • Explosive package assembly
    Patent number: 4280407
    Abstract: An explosive package is provided which is particularly adapted to be placed against and around the inside and outside curvature of a metal pipe for explosive welding purposes. The package is a substantially flat trapezoidal-shaped container, the shorter, non-parallel ends of which can be adjustably abutted against the non-parallel ends of a similar package in order to provide a continuous ring or band of explosives inside or outside the circumference of a pipe.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: July 28, 1981
    Assignee: C-I-L Inc.
    Inventors: John R. Allen, Louis-Georges Desrochers, Alain Loyer