Patents by Inventor Calvin W. Carmichael

Calvin W. Carmichael 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).

  • Adhesive secondary blasting cone
    Patent number: 5233926
    Abstract: A shaped secondary blasting charge including a frustoconical container and a viscous adhesive explosive overpacked into the container. A concave cover accommodates the overloaded explosive which is removed at the blasting site. The container with the explosive is pressed against the object to be blasted causing the viscous explosive to intimately bond to the surface.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: August 10, 1993
    Assignee: INCO Limited
    Inventors: Calvin W. Carmichael, Paul J. Dolan, Robert Park