John Shield

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San Mateo, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for improving the heap biooxidation rate of refractory sulfi...
- Patent number 6,086,656
- Issue date Jul 11, 2000
- Geobiotics, Inc.
- William J. Kohr
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for improving the heap biooxidation rate of refractory sulfi...
- Patent number 5,779,762
- Issue date Jul 14, 1998
- Geobiotics, Inc.
- William J. Kohr
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for improving the heap biooxidation rate of refractory sulfi...
- Patent number 5,688,304
- Issue date Nov 18, 1997
- Geobiotics, Inc.
- William J. Kohr
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...