Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4428843 | Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor | Jack C. Cowan, Tommy K. Thrash | 1984-01-31 |
| 4404107 | Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor | Jack C. Cowan, Tommy K. Thrash | 1983-09-13 |
| 4356096 | Method of enhancing the effect of liquid organic lubricants in drilling fluids | Jack C. Cowan, Tommy K. Thrash | 1982-10-26 |