Patents by Inventor John William Aiden Millar

John William Aiden Millar 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 for downhole logging
    Patent number: 6842697
    Abstract: A method and apparatus for measuring the properties such as permeability of the rock surrounding a borehole in which a directional seismic or sonic signal is generated downhole and propagated into the surrounding formation to generate an electrokinetic signal and the focus of the seismic signal is moved in three dimensions in the surrounding rock by physically moving the source or by having two seismic sources which generate oscillating seismic signals at different frequencies and the focus of the seismic signal is varied by wave interference or wave interaction.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: January 11, 2005
    Assignees: Groundflow Ltd., Sondex Ltd.
    Inventors: John William Aiden Millar, Richard Hedley Clarke, William Peter Stuart-Bruges