Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9638001 | Method for producing hydrocarbon gas from a wellbore and valve assembly | Cornelis Adrianus Maria Veeken, Lubbertus Lugtmeier, Derk Lucas Klompsma | 2017-05-02 |
| 7091160 | Methods and compositions for reducing subterranean formation permeabilities | Bach Dao, Marco Verlaan, Ron Bouwmeester, B. Raghava Reddy | 2006-08-15 |
| 7060129 | Process for controlling gas migration during well cementing | Bach Dao, Jan Pieter Vijn, Thien Van Pham | 2006-06-13 |
| 6936574 | Process for controlling gas migration during well cementing | Bach Dao, Jan Pieter Vijn, Thien Van Pham | 2005-08-30 |