Patents by Inventor Michael John Hutchings

Michael John Hutchings 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).

  • System and method for measuring the magnetic conductive properties of a test fluid
    Patent number: 6051970
    Abstract: The magnetic or conductive properties of a test fluid, or of particles within a test fluid, are measured by an apparatus comprising a solenoidal coil (1a), a magnetic field carrying means (23) disposed radially outside the solenoidal coil, a tubular electrostatic screen (22) disposed radially within the solenoidal coil and radially outside a sample detecting volume, the test fluid being disposed in use within the sample detecting volume and separated radially from the innermost surface of the electrostatic screen by an air gap (18). The solenoidal coil is energised in use, and sensing means is provided for sensing the impedance of the solenoidal coil.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: April 18, 2000
    Inventor: Michael John Hutchings