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Francis A. Thirion
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Liege, BE
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last 30 patents
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Patent Grant
Continuous process for preparing phosphoric acid and calcium sulphate
Patent number
4,777,027
Issue date
Oct 11, 1988
Prayon Developpment, Societe Anonyme
Armand L. Davister
C01 - INORGANIC CHEMISTRY
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Patent Grant
Method for the preparation of phosphoric acid and calcium sulphate
Patent number
4,588,570
Issue date
May 13, 1986
Prayon Development
Armand L. Davister
C01 - INORGANIC CHEMISTRY