David Krofchak

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Markham, Ontario, L3R 1G6, CA

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Patents Grantslast 30 patents

Information Patent Grant
Treatment of steel mill waste for recycling
- Patent number 5,439,505
- Issue date Aug 8, 1995
- David Krofchak
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Process for the treatment of incinerated sewage sludge ash
- Patent number 4,216,012
- Issue date Aug 5, 1980
- David Krofchak
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL