Gary D. Derdall

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Saskatchewan, CA

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing potassium sulfate via cation exchange
- Patent number 6,986,878
- Issue date Jan 17, 2006
- Dirdal Rand Technologies
- Gary Derdall
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for refining kaolin
- Patent number 5,143,599
- Issue date Sep 1, 1992
- Kaolin Industries, Ltd.
- Gary Derdall
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Apparatus for producing phosphoric acid from phosphate ore
- Patent number 5,093,088
- Issue date Mar 3, 1992
- Potash Corporation of Saskatchewan
- Gary D. Derdall
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for producing phosphoric acid from phosphate ore
- Patent number 4,828,811
- Issue date May 9, 1989
- Potash Corporation of Saskatchewan
- Gary D. Derdall
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for preparation of potassium salts from pulp of lignocellul...
- Patent number 4,735,683
- Issue date Apr 5, 1988
- Potash Corporation of Saskatchewan
- Alfred Wong
- C05 - FERTILISERS MANUFACTURE THEREOF

Patents Applicationslast 30 patents

Information Patent Application
Method of producing potassium sulfate
- Publication number 20030113253
- Publication date Jun 19, 2003
- Dirdal Rand Technologies
- Gary Derdall
- C01 - INORGANIC CHEMISTRY