Issued Patents All Time
Showing 51–61 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8082995 | Optimization of untreated oil shale geometry to control subsidence | William A. Symington | 2011-12-27 |
| 7857056 | Hydrocarbon recovery from impermeable oil shales using sets of fluid-heated fractures | William A. Symington | 2010-12-28 |
| 7669657 | Enhanced shale oil production by in situ heating using hydraulically fractured producing wells | William A. Symington, James M. Hutfilz | 2010-03-02 |
| 7647971 | Method of developing subsurface freeze zone | — | 2010-01-19 |
| 7647972 | Subsurface freeze zone using formation fractures | — | 2010-01-19 |
| 7644993 | In situ co-development of oil shale with mineral recovery | William A. Symington, Jesse D. Yeakel, Michele M. Thomas | 2010-01-12 |
| 7631691 | Methods of treating a subterranean formation to convert organic matter into producible hydrocarbons | William A. Symington, Abdel Wadood M. El-Rabaa, William P. Meurer, Quinn R. Passey, Michele M. Thomas | 2009-12-15 |
| 7516787 | Method of developing a subsurface freeze zone using formation fractures | — | 2009-04-14 |
| 7516785 | Method of developing subsurface freeze zone | — | 2009-04-14 |
| 7441603 | Hydrocarbon recovery from impermeable oil shales | William A. Symington | 2008-10-28 |
| 7331385 | Methods of treating a subterranean formation to convert organic matter into producible hydrocarbons | William A. Symington, Michele M. Thomas, Quinn R. Passey, Abdel Wadood M. El-Rabaa, Jeff H. Moss | 2008-02-19 |