Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6814798 | Storable water-microsphere suspensions for use in well cements and methods | Jan Pieter Vijn | 2004-11-09 |
| 6811603 | Methods, well cement compositions and lightweight additives therefor | Lance E. Brothers, Krista L. Keener, James A. Braden, Jan Pieter Vijn | 2004-11-02 |
| 6800128 | Whey protein retarder | Marcel Rietjens, Jan Pieter Vijn | 2004-10-05 |
| 6776237 | Lightweight well cement compositions and methods | Krishna M. Ravi, Jan Pieter Vijn, Christine Noik, Alain Rivereau | 2004-08-17 |
| 6730636 | Environmentally acceptable well cement fluid loss control additives, compositions and methods | Jan Pieter Vijn, Mohand Melbouci | 2004-05-04 |