Patents by Inventor Philip H. Porter

Philip H. Porter 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).

  • Expandable, self-tamping explosive bag
    Patent number: 4787316
    Abstract: A package for blasting agents including an outer bag of a first diameter formed of a multilayer rupturable paper material and an inner waterproof bag of a second diameter larger than the diameter of the outer bag such that, upon being dropped into a blast hole, the outer bag ruptures allowing the inner bag to expand to the full cross section of the hole without tamping while maintaining the blasting agent in a waterproof condition.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: November 29, 1988
    Assignee: Econex, Inc.
    Inventors: Fred C. Drury, Donald J. Westmaas, Philip H. Porter