Michael E. Chalkley

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St. Albert, CA

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Patents Grantslast 30 patents

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
Information Patent Grant
Purification of elemental sulphur
- Patent number 5,403,571
- Issue date Apr 4, 1995
- Sherritt Gordon Limited
- Michael E Chalkley
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Recovery of metals from sulphidic material
- Patent number 5,380,354
- Issue date Jan 10, 1995
- Sherritt Inc.
- Michael E. Chalkley
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Recovery of metal values from zinc plant residues
- Patent number 5,348,713
- Issue date Sep 20, 1994
- Sherritt Gordon Limited
- Derek E. Kerfoot
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Recovery of cobalt and nickel from sulphidic material
- Patent number 4,594,102
- Issue date Jun 10, 1986
- Sherritt Gordon Mines Limited
- Donald R. Weir
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for separately recovering zinc and lead values from zinc an...
- Patent number 4,545,963
- Issue date Oct 8, 1985
- Sherritt Gordon Mines Limited
- Donald R. Weir
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...