Patents by Inventor Peter W. John

Peter W. John 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).

  • Process for enlargement of rock fractures
    Patent number: 4408663
    Abstract: A process for enlarging or widening rock fractures in order to facilitate the recovery of deposits, such as oil or gas, comprising the emplacement of an aluminothermic mixture of aluminum and ferric oxide, and its subsequent ignition. Preferably, slag-forming products are also placed into the cavity, so as to prevent closure of the fractures after termination of the combustion process.
    Type: Grant
    Filed: September 9, 1981
    Date of Patent: October 11, 1983
    Inventor: Peter W. John
  • Process for determining the location and/or extent of rock cavities
    Patent number: 4158963
    Abstract: The size and location of rock formation cavities are determined by placing small bodies within the cavity, altering the physical or chemical state of the bodies within the cavity and measuring the change of state of the bodies thereby providing a measurement of the location or size of the cavity. Preferably, the small bodies are detonatable bodies which upon detonation provide an acoustic indication of the size and location of the cavity.
    Type: Grant
    Filed: January 11, 1978
    Date of Patent: June 26, 1979
    Assignee: Preussag Aktiengesellschaft
    Inventor: Peter W. John