Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7238733 | Storable water-silica suspensions and methods | Jan Pieter Vijn | 2007-07-03 |
| 7091160 | Methods and compositions for reducing subterranean formation permeabilities | Marco Verlaan, Ron Bouwmeester, Ewout Biezen, B. Raghava Reddy | 2006-08-15 |
| 7060129 | Process for controlling gas migration during well cementing | Ewout Biezen, Jan Pieter Vijn, Thien Van Pham | 2006-06-13 |
| 6936574 | Process for controlling gas migration during well cementing | Ewout Biezen, Jan Pieter Vijn, Thien Van Pham | 2005-08-30 |
| 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 |
| 6644405 | Storable water-microsphere suspensions for use in well cements and methods | Jan Pieter Vijn | 2003-11-11 |
| 6631766 | Methods, well cement compositions and lightweight additives therefor | Lance E. Brothers, Krista L. Keener, James A. Braden, Jan Pieter Vijn | 2003-10-14 |
| 6626992 | Environmentally acceptable well cement fluid loss control additives, compositions, and methods | Jan Pieter Vijn, Mohand Melbouci | 2003-09-30 |
| 6610140 | Delayed thixotropic cement compositions and methods | Jan Pieter Vijn | 2003-08-26 |
| 6591909 | Whey protein retarder | Marcel Rietjens, Jan Pieter Vijn | 2003-07-15 |
| 6562122 | Lightweight well cement compositions and methods | Krishna M. Ravi, Jan Pieter Vijn, Christine Noik, Alain Rivereau | 2003-05-13 |
| 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 |