Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8124670 | Water-soluble and biodegradable copolymers on a polyamide basis and use thereof | Martin Matzinger, Roland Reichenbach-Klinke, Johann Plank, Christian Spindler | 2012-02-28 |
| 7576039 | Additive for drilling fluids | Johann Huber, Johann Plank, Jurgen Heidlas, Peter M. Lange | 2009-08-18 |
| 6953090 | Cementing subterranean zones using cement compositions containing biodegradable dispersants | Jan Pieter Vijn, Christian Spindler, Johann Plank | 2005-10-11 |
| 6475959 | Method for the rheology control of fluid phases | Peter M. Lange, Johann Plank | 2002-11-05 |
| 6025303 | Solids composition based on clay minerals and use thereof | Johann Plank | 2000-02-15 |