David L. Gefvert

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Dublin, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Solvent extraction of precious metals with hydroxyquinoline and str...
- Patent number 5,284,633
- Issue date Feb 8, 1994
- Sherex Chemical Co., Inc.
- David L. Gefvert
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Separation of precious metals by an ion exchange process
- Patent number 5,256,187
- Issue date Oct 26, 1993
- Sherex Chemical Company, Inc.
- David L. Gefvert
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Dioxime kinetic enhancer for solvent extraction of gallium from bas...
- Patent number 4,855,114
- Issue date Aug 8, 1989
- Sherex Chemical Company, Inc.
- David L. Gefvert
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...