Ian F. Clelland

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Renfrew, CA

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Patents Grantslast 30 patents

Information Patent Grant
Sulphonated hydrocracking residues as concrete admixtures
- Patent number 5,584,920
- Issue date Dec 17, 1996
- Natural Resources Canada
- Henry Sawatzky
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES