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Chloride process for the leaching of gold
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Patent number 9,732,398
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Issue date Aug 15, 2017
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Process Research Ortech Inc.
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Vaikuntam I. Lakshmanan
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for extraction of rare earth elements
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Patent number 9,115,419
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Issue date Aug 25, 2015
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Process Research Ortech Inc.
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Vaikuntam I. Lakshmanan
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Recovery of zinc from galvanized coatings
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Patent number 6,878,356
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Issue date Apr 12, 2005
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Process Research Management Inc.
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Vaikuntam Iyer Lakshmanan
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Treatment of fly ash
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Patent number 6,730,161
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Issue date May 4, 2004
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Process Research Ortech, Inc.
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Vaikuntam Iyer Lakshmanan
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Process for treatment of flyash
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Patent number 4,966,761
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Issue date Oct 30, 1990
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Carbovan Inc.
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Vaikuntam I. Lakshmanan
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for treatment of flyash
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Patent number 4,798,709
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Issue date Jan 17, 1989
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Carbovan Inc.
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Vaikuntam I. Lakshmanan
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Recovery of precious metals
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Patent number 4,537,628
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Issue date Aug 27, 1985
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Ontario Research Foundation
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Vaikuntam I. Lakshmanan
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...