Issued Patents All Time
Showing 226–245 of 245 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5311943 | Blends of propoxy and ethoxy surfactants | — | 1994-05-17 |
| 5212093 | Method to determine drift and residual oil saturation | Edwin A. Richardson | 1993-05-18 |
| 5063772 | Method for troubleshooting gas-lift wells | Jeffrey F. Simmons, Edwin A. Richardson | 1991-11-12 |
| 5031697 | Method for troubleshooting gas-lift wells | Jeffrey F. Simmons, Edwin A. Richardson | 1991-07-16 |
| 4972704 | Method for troubleshooting gas-lift wells | Jeffrey F. Simmons, Edwin A. Richardson | 1990-11-27 |
| 4884455 | Method for analysis of failure of material employing imaging | Harold J. Vinegar, Jannetje De Waal | 1989-12-05 |
| 4856341 | Apparatus for analysis of failure of material | Harold J. Vinegar, Jannetje De Waal | 1989-08-15 |
| 4827761 | Sample holder | Harold J. Vinegar | 1989-05-09 |
| 4782898 | Determining residual oil saturation using carbon 14 labeled carbon dioxide | Edwin A. Richardson | 1988-11-08 |
| 4722394 | Determining residual oil saturation by radioactively analyzing injected CO.sub.2 and base-generating tracer-providing solution | Edwin A. Richardson | 1988-02-02 |
| 4663711 | Method of analyzing fluid saturation using computerized axial tomography | Harold J. Vinegar | 1987-05-05 |
| 4635197 | High resolution tomographic imaging method | Harold J. Vinegar | 1987-01-06 |
| 4613754 | Tomographic calibration apparatus | Harold J. Vinegar | 1986-09-23 |
| 4583242 | Apparatus for positioning a sample in a computerized axial tomographic scanner | Harold J. Vinegar | 1986-04-15 |
| 4571491 | Method of imaging the atomic number of a sample | Harold J. Vinegar | 1986-02-18 |
| 4542648 | Method of correlating a core sample with its original position in a borehole | Harold J. Vinegar | 1985-09-24 |
| 4540882 | Method of determining drilling fluid invasion | Harold J. Vinegar | 1985-09-10 |
| 4502538 | Polyalkoxy sulfonate, CO.sub.2 and brine drive process for oil recovery | Joseph Reisberg, Eugene F. Lutz, David B. Bright | 1985-03-05 |
| 4380266 | Reservoir-tailored CO.sub.2 -aided oil recovery process | — | 1983-04-19 |
| 4218327 | Stabilizing the viscosity of an aqueous solution of polysaccharide polymer | — | 1980-08-19 |