Donald Stephen Hopkins

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Thornhill, CA

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Patents Grantslast 30 patents

Information Patent Grant
Enhancement of cement clinker yield
- Patent number 6,391,105
- Issue date May 21, 2002
- Lafarge Canada Inc.
- David Bridson Oates
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement composition for alkali-reactive aggregate and for sulphate r...
- Patent number 5,928,420
- Issue date Jul 27, 1999
- Lafarge Canada, Inc.
- David Bridson Oates
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cementitious composition containing bottom ash as pozzolan and conc...
- Patent number 5,849,075
- Issue date Dec 15, 1998
- Lafarge Canada Inc.
- Donald Stephen Hopkins
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement with air-cooled slag and silica fume
- Patent number 5,735,947
- Issue date Apr 7, 1998
- Lafarge Canada Inc.
- Donald Stephen Hopkins
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Pozzolan blends
- Patent number 5,223,035
- Issue date Jun 29, 1993
- Lafarage Canada Inc.
- Donald S. Hopkins
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES