Patents by Inventor Robert E. McKelvey

Robert E. McKelvey 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).

  • Device for sealing charges in shot holes and a method for using the same
    Patent number: 6009946
    Abstract: A device and its method of application is described for inserting into a shot hole which is at least partially filled with a mud suspension, the device being enclosed by a cover soluble in the mud and containing an expandable material capable of expanding upon contact with the mud and forming a plug which is capable of sealing the borehole, to include apparatus allowing the plug container to be retrieved from the borehole.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: January 4, 2000
    Assignee: Exploration Products Company, LLC
    Inventor: Robert E. McKelvey