Robert A. Hard

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Still River, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
In-situ method and apparatus for sparging gas bubbles
- Patent number 4,360,234
- Issue date Nov 23, 1982
- Kennecott Copper Corporation
- Limin Hsueh
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
In-situ mining method and apparatus
- Patent number 4,116,488
- Issue date Sep 26, 1978
- Kennecott Copper Corporation
- Limin Hsueh
- E21 - EARTH DRILLING MINING
Information Patent Grant
In-situ mining of copper and nickel
- Patent number 4,045,084
- Issue date Aug 30, 1977
- Kennecott Copper Corporation
- Limin Hsueh
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of explosive fracturing of a formation at depth
- Patent number 3,951,458
- Issue date Apr 20, 1976
- Kennecott Copper Corporation
- Lawrence Maclagan Cathles
- E21 - EARTH DRILLING MINING