Herbert Kudelka

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Duisburg, DE

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Patents Grantslast 30 patents

Information Patent Grant
Production of sulphidic copper concentrates
- Patent number 4,260,588
- Issue date Apr 7, 1981
- Duisburger Dupferhutte
- Norbert L. Piret
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for recovering silver and gold from chloride solutions
- Patent number 4,131,454
- Issue date Dec 26, 1978
- Duisburger Kupferhutte
- Norbert L. Piret
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...