Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697444 | Carboxyalkyl substituted polygalactomannan fracturing fluids | Ralph Moorhouse | 1997-12-16 |
| 5614475 | Carboxyalkyl substituted polygalactomannan fracturing fluids | Ralph Moorhouse | 1997-03-25 |