| Patent | Date |
|---|
Pollution arrestor
Grant 5,536,477 - Cha , et al. July 16, 1 | 1996-07-16 |
Process for microwave catalysis of chemical reactions using waveguide liquid films
Grant 5,451,302 - Cha September 19, 1 | 1995-09-19 |
Process for co-recycling tires and oils
Grant 5,389,691 - Cha , et al. February 14, 1 | 1995-02-14 |
Process for oxide reactions by radiofrequency-char catalysis
Grant 5,256,265 - Cha October 26, 1 | 1993-10-26 |
Process for selected gas oxide removal by radiofrequency catalysts
Grant 5,246,554 - Cha September 21, 1 | 1993-09-21 |
Low-cost process for hydrogen production
Grant 5,198,084 - Cha , et al. March 30, 1 | 1993-03-30 |
Inclined fluidized bed system for drying fine coal
Grant 5,087,269 - Cha , et al. February 11, 1 | 1992-02-11 |
Process for removing heavy metal compounds from heavy crude oil
Grant 5,041,209 - Cha , et al. August 20, 1 | 1991-08-20 |
Pyrolysis methods with product oil recycling
Grant 4,983,278 - Cha , et al. January 8, 1 | 1991-01-08 |
Secondary oil shale recovery technique
Grant 4,458,946 - Hanna , et al. July 10, 1 | 1984-07-10 |
Reduction of shale oil pour point
Grant 4,437,519 - Cha , et al. March 20, 1 | 1984-03-20 |
Method for igniting an in situ oil shale retort
Grant 4,369,841 - Cha January 25, 1 | 1983-01-25 |
Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature
Grant 4,369,842 - Cha January 25, 1 | 1983-01-25 |
Method for assuring uniform combustion in an in situ oil shale retort
Grant 4,263,970 - Cha * April 28, 1 | 1981-04-28 |
Operation of in situ oil shale retort with void at the top
Grant 4,243,100 - Cha January 6, 1 | 1981-01-06 |
Locating the top of an in situ oil shale retort for ease of ignition
Grant 4,227,574 - Cha October 14, 1 | 1980-10-14 |
Determining the locus of a processing zone in an oil shale retort by effluent water composition
Grant 4,223,726 - Cha September 23, 1 | 1980-09-23 |
In situ retorting with high temperature oxygen supplying gas
Grant 4,192,381 - Cha March 11, 1 | 1980-03-11 |
Determining the locus of a processing zone in an oil shale retort by off gas composition
Grant 4,166,721 - Cha September 4, 1 | 1979-09-04 |
Determining the locus of a processing zone in an in situ oil shale retort
Grant 4,163,475 - Cha , et al. August 7, 1 | 1979-08-07 |
Decreasing hydrocarbon, hydrogen and carbon monoxide concentration of a gas
Grant 4,156,461 - Cha May 29, 1 | 1979-05-29 |
In situ oil shale retort with variations in surface area corresponding to kerogen content of formation within retort site
Grant 4,149,595 - Cha April 17, 1 | 1979-04-17 |
Operation of an in situ oil shale retort
Grant 4,149,752 - Cha , et al. April 17, 1 | 1979-04-17 |
Method for establishing a combustion zone in an in situ oil shale retort
Grant 4,147,389 - Bartel , et al. April 3, 1 | 1979-04-03 |
Two-stage removal of sulfur dioxide from process gas using treated oil shale
Grant 4,140,181 - Ridley , et al. February 20, 1 | 1979-02-20 |
Process for recovering carbonaceous values from post in situ oil shale retorting
Grant 4,105,072 - Cha August 8, 1 | 1978-08-08 |
| 