Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6437068 | Water-soluble or water-swellable crosslinked copolymers | Matthias Loffler | 2002-08-20 |
| 6395853 | Water-soluble copolymers and their use for exploration and production of petroleum and natural gas | Reinhard J. Oswald, Karl Heinz Heier, Aranka Tardi, Juergen Tonhauser, Christoph Kayser +1 more | 2002-05-28 |
| 6380137 | Copolymers and their use as drilling aids | Karl Heinz Heier, Aranka Tardi, Susanne Weber, Gernold Botthof | 2002-04-30 |