Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36066 | Use of selected ester oils in drilling fluids and muds | Heinz Mueller, Claus-Peter Herold, Stephan von Tapavicza, Jean-Marc Braun, Stuart Paul Smith | 1999-01-26 |
| 5755892 | Waste disposal of contaminated drill cuttings from geological drilling using drilling fluid systems containing mineral oil | Claus-Peter Herold, Heinz Mueller, Stephan von Tapavizca, Malcolm Ellice | 1998-05-26 |
| 5252554 | Drilling fluids and muds containing selected ester oils | Heinz Mueller, Claus-Peter Herold, Stephan von Tapavicza, Jean-Marc Braun, Stuart Paul Smith | 1993-10-12 |
| 5232910 | Use of selected ester oils in drilling fluids and muds | Heinz Mueller, Claus-Peter Herold, Stephan von Tapavicza, Jean-Marc Braun, Stuart Paul Smith | 1993-08-03 |