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Johannes A. Janssen
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Schinveld, NL
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last 30 patents
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Patent Grant
Process for the removal of heavy metals from acid, phosphate-contai...
Patent number
4,822,582
Issue date
Apr 18, 1989
Stamicarbon B.V.
Cornelis A. M. Weterings
C05 - FERTILISERS MANUFACTURE THEREOF
Information
Patent Grant
Process for recovering a uranium-containing concentrate and purifie...
Patent number
4,514,365
Issue date
Apr 30, 1985
Stamicarbon B.V.
Cornelis A.M. Weterings
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for recovering a uranium-containing concentrate and purifie...
Patent number
4,450,142
Issue date
May 22, 1984
Stamicarbon B.V.
Cornelis A.M. Weterings
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for recovering yttrium and lanthanides from wet-process pho...
Patent number
4,390,507
Issue date
Jun 28, 1983
Stamicarbon, B.V.
Cornelis A. M. Weterings
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for the recovery of substantially radium free calcium sulph...
Patent number
4,387,077
Issue date
Jun 7, 1983
Stamicarbon, B.V.
Cornelis A. M. Weterings
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of calcium sulphate anhydrite and calci...
Patent number
4,387,083
Issue date
Jun 7, 1983
Stamicarbon, B.V.
Cornelis A. M. Weterings
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES