Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825072 | Method and apparatus for determining well fluid flow velocity using a nonradioactive tracer | Vernie C. McWhirter, David P. Hollingsworth | 1989-04-25 |
| 4596927 | Method and apparatus for induced gamma ray logging | Eric C. Hopkinson | 1986-06-24 |
| 4507553 | Method and apparatus for identifying vanadium in earth formations | Walter H. Fertl | 1985-03-26 |
| 4500781 | Method and apparatus for determining neutron characteristics of borehole fluids | Richard B. Culver | 1985-02-19 |
| 4430567 | Method and apparatus for neutron induced gamma ray logging for direct porosity identification | David M. Chace | 1984-02-07 |
| 4415805 | Method and apparatus for evaluating multiple stage fracturing or earth formations surrounding a borehole | Walter H. Fertl | 1983-11-15 |
| 4399359 | Method for monitoring flood front movement during water flooding of subsurface formations | Walter H. Fertl, Elton Frost, Jr. | 1983-08-16 |
| 4239965 | Method and apparatus for neutron induced gamma ray logging for direct porosity identification | Richard B. Culver | 1980-12-16 |