Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362713 | Drilling mud compositions | John A. Westland, Deborah A. Lenk | 1994-11-08 |
| 5350528 | Method of supporting fractures in geological formations and hydraulic fluid composition for same | John A. Westland, R. Scott Stephens, Alan R. Winslow | 1994-09-27 |