Issued Patents 1994
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5348938 | Oleophilic alcohols as a constituent of invert drilling fluids | Claus-Peter Herold, Stephan von Tapavicza | 1994-09-20 |
| 5322392 | Process for rock consolidation and/or cavity filling e.g. in tunnel construction and mining | Claus-Peter Herold, Stephan von Tapavicza, Helmut Edel | 1994-06-21 |
| 5318954 | Use of selected ester oils of low carboxylic acids in drilling fluids | Claus-Peter Herold, Stephan von Tapavicza, Michael Neuss, Frank Burbach | 1994-06-07 |
| 5318955 | Use of selected ethers of monofunctional alcohols in drilling fluids | Gerhard Stoll, Claus-Peter Herold, Stephan von Tapavicza | 1994-06-07 |
| 5318956 | Use of selected ester oils in water-based drilling fluids of the O/W emulsion type and corresponding drilling fluids with improved ecological acceptability | Claus-Peter Herold, Stephan von Tapavicza, Johann F. Fues | 1994-06-07 |