David Krofchak

Person

Copper Cliff, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Recovery of precious metals from metal alloys produced aluminotherm...
- Patent number 6,440,194
- Issue date Aug 27, 2002
- Fenicem Minerals Inc.
- David Krofchak
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Treatment of phosphatic wastes
- Patent number 6,231,767
- Issue date May 15, 2001
- Claytech Enviromental Services Inc.
- David Krofchak
- C05 - FERTILISERS MANUFACTURE THEREOF
Information Patent Grant
Method of making cement or mine backfill from base metal smelter slag
- Patent number 6,033,467
- Issue date Mar 7, 2000
- Fenicem Minerals Inc.
- David Krofchak
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for recovering mineral particles, metal particles or small...
- Patent number 6,026,965
- Issue date Feb 22, 2000
- Ateba Mines Inc.
- Roberto Berardi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method of making cement from base metal smelter slag
- Patent number 5,968,258
- Issue date Oct 19, 1999
- Fenicem Minerals Inc.
- David Krofchak
- C21 - METALLURGY OF IRON
Information Patent Grant
Recovering precious metals and small precious stones from clay susp...
- Patent number 5,893,463
- Issue date Apr 13, 1999
- Ateba Mines Inc.
- David Krofchak
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method of recovering metals and producing a secondary slag from bas...
- Patent number 5,865,872
- Issue date Feb 2, 1999
- Fenicem Minerals Inc.
- David Krofchak
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of making cement from base metal smelter slag
- Patent number 5,749,962
- Issue date May 12, 1998
- Fenicem Minerals, Inc.
- David Krofchak
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of recovering metals and producing a secondary slag from bas...
- Patent number 5,626,646
- Issue date May 6, 1997
- Fenicem Minerals Inc.
- David Krofchak
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of making concrete from base metal smelter slag
- Patent number 5,593,493
- Issue date Jan 14, 1997
- David Krofchak
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of treating steel mill waste
- Patent number 5,573,576
- Issue date Nov 12, 1996
- International Solidification, Inc.
- David Krofchak
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
Treatment of base metal smelter slag
- Publication number 20070209476
- Publication date Sep 13, 2007
- David Krofchak
- C21 - METALLURGY OF IRON
Information Patent Application
Manufacture of sodium tripolyphosphate
- Publication number 20020170849
- Publication date Nov 21, 2002
- David Krofchak
- C01 - INORGANIC CHEMISTRY
Information Patent Application
Method of making cement from tailings or rock fines containing sili...
- Publication number 20020033120
- Publication date Mar 21, 2002
- Roberto Berardi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

David Krofchak

Person

Patents Grantslast 30 patents

Recovery of precious metals from metal alloys produced aluminotherm...

Treatment of phosphatic wastes

Method of making cement or mine backfill from base metal smelter slag

Process for recovering mineral particles, metal particles or small...

Method of making cement from base metal smelter slag

Recovering precious metals and small precious stones from clay susp...

Method of recovering metals and producing a secondary slag from bas...

Method of making cement from base metal smelter slag

Method of recovering metals and producing a secondary slag from bas...

Method of making concrete from base metal smelter slag

Method of treating steel mill waste

Patents Applicationslast 30 patents

Treatment of base metal smelter slag

Manufacture of sodium tripolyphosphate

Method of making cement from tailings or rock fines containing sili...