Patents by Inventor Robert G. Smith, Jr.

Robert G. Smith, Jr. 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).

  • Zinc oxide inhibited emulsion explosives and method
    Patent number: 6125761
    Abstract: A method of blasting in reactive ores includes diluting hot liquor of ammonium nitrate with water to provide diluted ammonium nitrate solution of predetermined concentration, adjusting the pH of the liquor of the ammonium nitrate solution, adding a predetermined amount of gassing agent to the ammonium nitrate solution, and emulsifying the ammonium nitrate solution. Then an effective amount of fine zinc oxide powder is mixed with the emulsion explosive and the inhibited emulsion explosive is introduced into a borehole and detonated.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: October 3, 2000
    Assignee: Southwest Energy Inc.
    Inventors: Robert G. Smith, Jr., Harry R. Fee