Patents by Inventor Colin Hunter

Colin Hunter 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).

  • Heap leach
    Publication number: 20060248983
    Abstract: An improved heap leach process for the bacterial heap leaching of base metal sulphide ores, the process including the addition of elemental sulphur to the ore, whereby sulphur oxidising bacteria indigenous to, or added to, the ore may oxidise the elemental sulphur and generate heat within the ore heap.
    Type: Application
    Filed: February 24, 2004
    Publication date: November 9, 2006
    Applicant: BIOHEAP Limited
    Inventors: Colin Hunter, Tamsin Williams
  • Smoke meter
    Patent number: 5353629
    Abstract: A smoke meter is particularly adapted to meter the smoke content of vehicle exhaust gases. The meter includes a measuring tube with a light at one end and a light detector at the other end, the amount of light detected corresponding to the smoke content. The optical surfaces are kept clean by inducing a flow of clean air across the surfaces using an air supply which also induces flow of gas into the measuring tube.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: October 11, 1994
    Assignee: L. L. Churchill Limited
    Inventor: Colin Hunter