Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6422326 | Aphron-containing well drilling and servicing fluids of enhanced stability | Tommy F. Brookey | 2002-07-23 |
| 6358889 | Viscosified aqueous chitosan-containing well drilling and servicing fluids | John H. Waggenspack, Kimely P. Pitre | 2002-03-19 |