Patents by Inventor Calvin D. Cahill

Calvin D. Cahill 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).

  • Method and apparatus for hydraulic embedment of waste in subterranean formations
    Patent number: 5318382
    Abstract: There is disclosed a method and apparatus for waste disposal by hydraulic embedment in a subterranean formation. A method in accordance with the present invention comprises the steps of drilling into stable geologic formations thousands of feet below ground, fracturing those formations, pumping a mixture of hazardous waste in solid, liquid, or sludge form and a selected transport medium into the fractured formations, and preventing migration of the waste. Although a suitable transport medium can be selected based on a number of factors, transport media selected in accordance with one aspect of the present invention prevent migration of the waste by reacting chemically or to either heat or pressure or both to become highly viscous or solid.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: June 7, 1994
    Inventor: Calvin D. Cahill
  • Method and apparatus for hydraulic embedment of waste in subterranean formations
    Patent number: 5133624
    Abstract: There is disclosed a method and apparatus for waste disposal by hydraulic embedment in a subterranean formation. A method in accordance with the present invention comprises the steps of drilling into stable geologic formations thousands of feet below ground, fracturing those formations, pumping a mixture of hazardous waste in solid, liquid, or sludge form and a selected transport medium into the fractured formations, and preventing migration of the waste. Although a suitable transport medium can be selected based on a number of factors, transport media selected in accordance with one aspect of the present invention prevent migration of the waste by reacting chemically or to either heat or pressure or both to become highly viscous or solid.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: July 28, 1992
    Inventor: Calvin D. Cahill