Issued Patents All Time
Showing 101–110 of 110 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5841135 | Method and apparatus for measuring formation density and the formation photo-electric factor with a multi-detector gamma-gamma tool | Nihal Wijeyesekera, Urmi DasGupta, Donald C. McKeon, Peter Wraight | 1998-11-24 |
| 5699246 | Method to estimate a corrected response of a measurement apparatus relative to a set of known responses and observed measurements | Ronald E. Plasek, Robert A. Adolph | 1997-12-16 |
| 5521378 | Method and apparatus for gamma ray logging of underground formations | Bradley A. Roscoe, James A. Grau | 1996-05-28 |
| 5369578 | Method and apparatus for using non-linear spectral fitting procedures on gamma-ray spectral data | Bradley A. Roscoe | 1994-11-29 |
| 5360975 | Method of gain regulation for downhole spectroscopy tools without using a calibration source | — | 1994-11-01 |
| 5105080 | Method and apparatus for determining the respective contributions of borehole and earth formation in gamma ray spectroscopy | Robert A. Adolph | 1992-04-14 |
| 5081351 | Method and apparatus for borehole correction in capture gamma ray spectroscopy measurements | Bradley A. Roscoe | 1992-01-14 |
| 5055676 | Method for determining oil and water saturation in earth formation surrounding a borehole | Bradley A. Roscoe | 1991-10-08 |
| 5045693 | Carbon/oxygen well logging method and apparatus | Donald C. McKeon, Bradley A. Roscoe | 1991-09-03 |
| 4937446 | Carbon/oxygen well logging method and apparatus | Donald C. McKeon, Bradley A. Roscoe | 1990-06-26 |