Patents by Inventor Daniel Ashman

Daniel Ashman 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 bioleaching process for the extraction of zinc
    Publication number: 20070193413
    Abstract: A method of extracting zinc from a sulphidic ore is provided which comprises bioleaching the ore in a heap with acidophilic microorganisms to produce a pregnant leach solution which is recovered from the bottom of the heap. An integrated process which comprises subjecting the pregnant leach solution to neutralization and solvent extraction to produce a concentrated zinc solution is also provided. Zinc may be recovered from the concentrated solution by means of electrowinning, either in the absence or presence of manganese. Alternatively zinc may be recovered in the form of a zinc compound.
    Type: Application
    Filed: July 10, 2002
    Publication date: August 23, 2007
    Inventors: Juris Harlamovs, Daniel Ashman, Jose Alberto Dominguez, Hector Lizama, Dilipkumar Makwana, Andrew Stradling
  • Heap bioleaching process for the extraction of zinc
    Publication number: 20050066773
    Abstract: A method of extracting zinc from a sulphidic ore is provided which comprises bioleaching the ore in a heap with acidophilic microorganisms to produce a pregnant leach solution which is recovered from the bottom of the heap. An integrated process which comprises subjecting the pregnant leach solution to neutralization and solvent extraction to produce a concentrated zinc solution is also provided. Zinc may be recovered from the concentrated solution by means of electrowinning, either in the absence or presence of manganese. Alternatively zinc may be recovered in the form of a zinc compound.
    Type: Application
    Filed: July 10, 2002
    Publication date: March 31, 2005
    Inventors: Juris Harlamovs, Daniel Ashman, Jose Alberto Dominguez, Hector Lizama, Dilipkumar Makwana, Andrew Stradling