John C. Yannopoulos

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Danbury, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Smelting of copper concentrates by oxygen injection in conventional...
- Patent number 4,274,870
- Issue date Jun 23, 1981
- Newmont Exploration Limited
- John C. Yannopoulos
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Treatment of copper refinery slimes
- Patent number 4,094,668
- Issue date Jun 13, 1978
- Newmont Exploration Limited
- John C. Yannopoulos
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...