Leif Johansson

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Skelleftehamn, SE

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Patents Grantslast 30 patents

Information Patent Grant
Method for recovering precious metals
- Patent number 4,613,365
- Issue date Sep 23, 1986
- Boliden Aktiebolag
- Hans G. Berg
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for recovering the valuable metal content of contaminated co...
- Patent number 4,608,083
- Issue date Aug 26, 1986
- Boliden Aktiebolag
- Sven A. Holmstrom
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for recovering the metal values from materials containing ti...
- Patent number 4,571,260
- Issue date Feb 18, 1986
- Boliden Aktiebolag
- Leif Johansson
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...