Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457523 | Delayed thixotropic cement compositions and methods | Jan Pieter Vijn | 2002-10-01 |
| 6405801 | Environmentally acceptable well cement fluid loss control additives, compositions and methods | Jan Pieter Vijn, Mohand Melbouci | 2002-06-18 |