Roy G. Lewis

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Tucson, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Process of extraction of gallium from aqueous solutions thereof
- Patent number 4,965,054
- Issue date Oct 23, 1990
- Henkel Corporation
- Roy G. Lewis
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Solvent extraction process
- Patent number 4,957,714
- Issue date Sep 18, 1990
- Henkel Corporation
- Stephen M. Olafson
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Solvent extraction process for recovery of zinc
- Patent number 4,563,256
- Issue date Jan 7, 1986
- Henkel Corporation
- R. Brantley Sudderth
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...