Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5318954 | Use of selected ester oils of low carboxylic acids in drilling fluids | Heinz Mueller, Claus-Peter Herold, Michael Neuss, Frank Burbach | 1994-06-07 |
| 5254531 | Oleophilic basic amine compounds as an additive for invert drilling muds | Heinz Mueller, Claus-Peter Herold | 1993-10-19 |
| 5252554 | Drilling fluids and muds containing selected ester oils | Heinz Mueller, Claus-Peter Herold, 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, Claus-Peter Herold, 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, Claus-Peter Herold, Edmund Edel | 1993-04-06 |
| 5194422 | Use of selected oleophilic alcohols in water-based drilling fluids of the O/W-emulsion type and corresponding drilling fluids with improved ecological acceptability | Heinz Mueller, Klaus Herold, Johann F. Fues | 1993-03-16 |
| 5106516 | Monocarboxylic acid methylesters in invert drilling muds | Heinz Mueller, Claus-Peter Herold | 1992-04-21 |
| 5028342 | Drilling mud additives based on a polymer mixture, their use, and a process for their production | Willy Opitz, Heinz Mueller, Claus-Peter Herold | 1991-07-02 |
| 4964615 | Compositions for freeing jammed drill pipes | Heinz Mueller, Claus-Peter Herold | 1990-10-23 |