698638 ALBERTA LTD

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Recovery of zinc from sulphidic concentrates
- Patent number 5,770,170
- Issue date Jun 23, 1998
- 698638 Alberta Ltd.
- Michael J. Collins
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Hydrometallurgical process for the extraction of copper from sulphi...
- Patent number 5,730,776
- Issue date Mar 24, 1998
- 698638 Alberta Ltd.
- Michael J. Collins
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Purification of elemental sulphur
- Patent number 5,711,929
- Issue date Jan 27, 1998
- 698638 Alberta Ltd.
- Michael E. Chalkley
- C01 - INORGANIC CHEMISTRY

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