Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5348938 | Oleophilic alcohols as a constituent of invert drilling fluids | Heinz Mueller, Stephan von Tapavicza | 1994-09-20 |
| 5322392 | Process for rock consolidation and/or cavity filling e.g. in tunnel construction and mining | Heinz Mueller, Stephan von Tapavicza, Helmut Edel | 1994-06-21 |
| 5318955 | Use of selected ethers of monofunctional alcohols in drilling fluids | Heinz Mueller, Gerhard Stoll, Stephan von Tapavicza | 1994-06-07 |
| 5318954 | Use of selected ester oils of low carboxylic acids in drilling fluids | Heinz Mueller, Stephan von Tapavicza, Michael Neuss, Frank Burbach | 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 | Heinz Mueller, Stephan von Tapavicza, Johann F. Fues | 1994-06-07 |
| 5254531 | Oleophilic basic amine compounds as an additive for invert drilling muds | Heinz Mueller, Stephan von Tapavicza | 1993-10-19 |
| 5252554 | Drilling fluids and muds containing selected ester oils | Heinz Mueller, Stephan von Tapavicza, Douglas J. Grimes, Jean-Marc Braun, Stuart Paul Smith | 1993-10-12 |
| 5232910 | Use of selected ester oils in drilling fluids and muds | Heinz Mueller, Stephan von Tapavicza, Douglas J. Grimes, Jean-Marc Braun, Stuart Paul Smith | 1993-08-03 |
| 5199823 | Aqueous resin preparations and a process for stabilizing rock and plugging cavities | Heinz Mueller, Stephan von Tapavicza, Edmund Edel | 1993-04-06 |
| 5106516 | Monocarboxylic acid methylesters in invert drilling muds | Heinz Mueller, Stephan von Tapavicza | 1992-04-21 |
| 5039432 | Copolymers of (meth) acrylic acid esters as flow improvers in oils | Wolfgang Ritter, Claudia Meyer, Wolfgang Zoellner, Stephan V. Tapavicza | 1991-08-13 |
| 5028342 | Drilling mud additives based on a polymer mixture, their use, and a process for their production | Willy Opitz, Heinz Mueller, Stephan von Tapavicza | 1991-07-02 |
| 5006621 | Co-polymers of long chain alkyl acrylates with N-containing olefins and their use as flow improvers for crude oils | Bernd Wahle, Wolfgang Zoellner, Ludwig Schieferstein, Doris Oberkobusch | 1991-04-09 |
| 4964615 | Compositions for freeing jammed drill pipes | Heinz Mueller, Stephan von Tapavicza | 1990-10-23 |
| 4888120 | Water-based drilling and well-servicing fluids with swellable, synthetic layer silicates | Heinz Mueller, Stephan van Tapavizca, Hans Dolhaine, Wolfgang von Rybinski, Winfried Wichelhaus | 1989-12-19 |
| 4851142 | Fluid loss additive for well drilling fluids | William Chrys Scoggins, Heinz Mueller | 1989-07-25 |
| 4802998 | Powder-form lubricant additives for water-based drilling fluids | Heinz Mueller | 1989-02-07 |
| 4668733 | Pour point depressants comprising polyolefins modified with side chains | Hermann Anzinger, Herbert Fischer, Wolfgang Zoellner | 1987-05-26 |
| 4187121 | Clear-rinse agent for mechanical dishwashers | Dieter Grodau, Theodor Altenschopfer | 1980-02-05 |