Alexander Krupin

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Oismatee, EE

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Patents Grantslast 30 patents

Information Patent Grant
Chemical beneficiation of raw material containing tantalum-niobium
- Patent number 7,718,147
- Issue date May 18, 2010
- Krupinite Corporation Ltd.
- Alexander Krupin
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...