Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4953399 | Method and apparatus for determining characteristics of clay-bearing formations | Ashok Sinha | 1990-09-04 |
| 4756189 | Method and apparatus for determining characteristics of clay-bearing formations | Ashok Sinha | 1988-07-12 |
| 4700140 | Determination of water or residual oil saturation in earth formations independent of lithology | — | 1987-10-13 |
| 4636994 | Method of determining shear wave travel time in subsurface formations | Elton Frost, Jr. | 1987-01-13 |
| 4622849 | Method and apparatus for determining characteristics of clay-bearing formations | — | 1986-11-18 |
| 4617517 | Determination of water saturation in earth formations independent of lithology | — | 1986-10-14 |
| 4594887 | Method and apparatus for determining characteristics of clay-bearing formations | Naum Rukhovets | 1986-06-17 |
| 4507553 | Method and apparatus for identifying vanadium in earth formations | Donald W. Oliver | 1985-03-26 |
| 4494071 | Determination of water saturation in earth formations independent of lithology | — | 1985-01-15 |
| 4484470 | Method and apparatus for determining characteristics of clay-bearing formations | Naum Ruhovets | 1984-11-27 |
| 4415805 | Method and apparatus for evaluating multiple stage fracturing or earth formations surrounding a borehole | Donald W. Oliver | 1983-11-15 |
| 4399359 | Method for monitoring flood front movement during water flooding of subsurface formations | Elton Frost, Jr., Donald W. Oliver | 1983-08-16 |
| RE31122 | Method for ascertaining optimum location for well stimulation and/or perforation | Donald B. Vaello | 1983-01-11 |
| 4346592 | Method for determining effective reservoir porosity | Marvin R. DeVries | 1982-08-31 |
| 4263509 | Method for in situ determination of the cation exchange capacities of subsurface formations | David W. Welker | 1981-04-21 |
| 4187908 | Method for ascertaining optimum location for well stimulation and/or perforation | Donald B. Vaello | 1980-02-12 |