Patents by Inventor Steven McCallum Turnbull

Steven McCallum Turnbull 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).

  • Plasma channel drilling process
    Patent number: 7270195
    Abstract: Material is removed from a body of material, e.g. to create a bore hole, by plasma channel drilling. High voltage, high energy, rapid rise time electrical pulses are delivered many times per second to an electrode assembly in contact with the material body to generate therein elongate plasma channels which expand rapidly following electrical breakdown of the material causing the material to fracture and fragment.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: September 18, 2007
    Assignee: University of Strathclyde
    Inventors: Scott John MacGregor, Steven McCallum Turnbull