Patents by Inventor James William Rackham

James William Rackham 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).

  • Providing information
    Patent number: 7429739
    Abstract: By considering ratio of emissions at one or more pairs of energies to threshold values, the invention provides for the determination of the dispersion format of a radioactive material within a matrix, wherein said radioactive material is potentially present in a dispersion format which is self-shielding against emissions arising from said radioactive. In particular the presence of lumpy material or the confirmation that lump material is absent may be provided. The following pairs of energies: 143.8 keV and 185.7 keV; 163.3 keV and 185.7 keV; 205.3 keV and 187.5 keV may be used.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: September 30, 2008
    Assignee: VT Nuclear Services Limited
    Inventors: James William Rackham, Thomas Dockray