Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6395853 | Water-soluble copolymers and their use for exploration and production of petroleum and natural gas | Roman Morschhäuser, Karl Heinz Heier, Aranka Tardi, Juergen Tonhauser, Christoph Kayser +1 more | 2002-05-28 |
| 6277900 | Well cementing aids | Volker Frenz, Juergen Tonhauser, Aranka Tardi, Pierre Maroy, Florence L'Alloret | 2001-08-21 |