Joseph A. Affholter

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Coleman, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Integrated in situ retorting and refining of oil shale
- Patent number 8,261,823
- Issue date Sep 11, 2012
- Gilman A. Hill
- E21 - EARTH DRILLING MINING
Information Patent Grant
Integrated in situ retorting and refining of heavy-oil and tar sand...
- Patent number 8,235,117
- Issue date Aug 7, 2012
- Gilman A. Hill
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole combustion unit and process for TECF injection into carbon...
- Patent number 8,091,626
- Issue date Jan 10, 2012
- Gilman A. Hill
- E21 - EARTH DRILLING MINING
Information Patent Grant
Integrated in situ retorting and refining of oil shale
- Patent number 7,980,312
- Issue date Jul 19, 2011
- Gilman A. Hill
- E21 - EARTH DRILLING MINING