Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5269892 | Process and reactor for char-gas oxide reactions by radiofrequency catalysis | — | 1993-12-14 |
| 5256265 | Process for oxide reactions by radiofrequency-char catalysis | — | 1993-10-26 |
| 5246554 | Process for selected gas oxide removal by radiofrequency catalysts | — | 1993-09-21 |
| 5198084 | Low-cost process for hydrogen production | Hans Bauer, Robert W. Grimes, III | 1993-03-30 |
| 5171406 | Fluidized bed selective pyrolysis of coal | Jer-Yu Shang, Norman W. Merriam | 1992-12-15 |
| 5164054 | Low-cost process for hydrogen production | Hans Bauer, Robert W. Grimes, III | 1992-11-17 |
| 5087269 | Inclined fluidized bed system for drying fine coal | Norman W. Merriam, John E. Boysen | 1992-02-11 |
| 5041209 | Process for removing heavy metal compounds from heavy crude oil | John E. Boysen, Jan F. Branthaver | 1991-08-20 |
| 4983278 | Pyrolysis methods with product oil recycling | Michael Duc, Curtis J. Hogan | 1991-01-08 |
| 4611856 | Two-level, horizontal free face mining system for in situ oil shale retorts | Thomas E. Ricketts | 1986-09-16 |
| 4458946 | Secondary oil shale recovery technique | Kanaan Hanna, Gordon B. French | 1984-07-10 |
| 4437519 | Reduction of shale oil pour point | Harry E. McCarthy | 1984-03-20 |
| 4383912 | Processes of pyrolysis and treatment of pyrolysis residues | Moussa Saadi, Rabah Bouchta, Mohamed Sdiqui, Bachir Barodi | 1983-05-17 |
| 4378841 | Ignition technique for an in situ oil shale retort | — | 1983-04-05 |
| 4369842 | Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature | — | 1983-01-25 |
| 4369841 | Method for igniting an in situ oil shale retort | — | 1983-01-25 |
| 4367901 | Method for forming an in situ oil shale retort | — | 1983-01-11 |
| 4279302 | Determining the locus of a processing zone in an oil shale retort by effluent off gas heating value | — | 1981-07-21 |
| 4263970 | Method for assuring uniform combustion in an in situ oil shale retort | — | 1981-04-28 |
| 4246965 | Method for operating an in situ oil shale retort having channelling | — | 1981-01-27 |
| 4243100 | Operation of in situ oil shale retort with void at the top | — | 1981-01-06 |
| 4227574 | Locating the top of an in situ oil shale retort for ease of ignition | — | 1980-10-14 |
| 4224990 | Method for flattening the combustion zone in an in situ oil shale retort by the addition of fuel | — | 1980-09-30 |
| 4223726 | Determining the locus of a processing zone in an oil shale retort by effluent water composition | — | 1980-09-23 |
| 4192381 | In situ retorting with high temperature oxygen supplying gas | — | 1980-03-11 |