Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6013114 | Environmentally friendly diesel fuel | Frank Weinelt, Heinz Wittkus, Werner Reimann | 2000-01-11 |
| 5830830 | Use of acetal-containing mixtures | Heinz Wittkus, Frank Weinelt | 1998-11-03 |
| 5759963 | Use of acetals | Heinz Wittkus, Bernd Windhausen, Hans Scholz, Frank Weinelt | 1998-06-02 |
| 5607618 | Use of a water-soluble copolymers based on acrylamidoalkylenesulfonic acid as a detergent additive | Werner Antwerpen, Gerd Reinhardt | 1997-03-04 |
| 5510436 | Water-soluble copolymers useful in drilling fluids | Heinz Wittkus, Jürgen TONHAUSER, Fritz Engelhardt, Ulrich Riegel | 1996-04-23 |
| 5421993 | Process of inhibiting corrosion, demulsifying and/or depressing the pour point of crude oil | Rainer Kupfer, Roland Bohm | 1995-06-06 |
| 5385674 | Process for separation of petroleum emulsions of the water-in-oil type | Rainer Kupfer, Roland Bohm, Friedrich Staiss | 1995-01-31 |
| 5114616 | Esterified glycidyl ether addition products and their use | Rainer Kupfer, Roland Bohm, Friedrich Staiss | 1992-05-19 |
| 5039450 | Process for the separation of crude oil emulsions of the water-in-oil type | Rainer Kupfer, Willibald Bose, Roland Bohm, Friedrich Staiss | 1991-08-13 |
| 4920151 | Microbicidal agents based on alkyl-di-guanidinium salts | Karl H. Wallhausser, Hans-Walter Bucking, Manfred Hofinger | 1990-04-24 |
| 4885110 | Branched polyoxyalkylene copolyesters, a process for their preparation, and their use | Willibald Bose, Manfred Hofinger, Roland Bohm, Friedrich Staiss | 1989-12-05 |
| 4885111 | Branched, quaternary polyoxyalkylene copolyesters, a process for their preparation, and their use | Wllibald Bose, Manfred Hofinger, Roland Bohm, Friedrich Staiss | 1989-12-05 |
| 4734523 | Oxalkylated polyester-amines, a process for their preparation and their use | Manfred Hofinger, Willibald Bose, Roland Bohm, Friedrich Staiss | 1988-03-29 |
| 4730079 | Quaternary oxalkylated polycondensates | Manfred Hofinger, Willibald Bose, Roland Bohm | 1988-03-08 |
| 4686066 | Method for the separation of oil-in-water emulsions | Manfred Hofinger, Roland Bohm | 1987-08-11 |
| 4587283 | Cement slurries for deep holes, with a copolymer content for reducing the water loss | Wolfgang Friede, Heinz Wittkus, Friedrich Engelhardt, Ulrich Riegel | 1986-05-06 |
| 4536339 | Bisamides, a process for their preparation and their use | Werner Ritschel, Helmut Diery | 1985-08-20 |
| 4482724 | Bisimidazolines | Werner Ritschel, Helmut Diery | 1984-11-13 |
| 4465817 | Modified etherified phenol/aldehyde condensation products and their use for breaking petroleum emulsions | Siegfried Billenstein, Fritz J. Gohlke, Roland Bohm | 1984-08-14 |
| 4451671 | Cationic ethylene oxide/propylene oxide and ethylene oxide/butylene oxide polymers, a process for their preparation and their use | Helmut Diery, Norbert Wester | 1984-05-29 |
| 4420413 | Oxyalkylated addition products from ethylene oxide-propylene oxide block polymers and bis-glycidyl ethers and their use | Helmut Diery | 1983-12-13 |
| 4419265 | Addition products from ethylene oxide-propylene oxide block polymers and bis-glycidyl ethers, a process for their preparation and their use | Helmut Diery | 1983-12-06 |
| 4416796 | Emulsion-breaking composition | Roland Bohm | 1983-11-22 |
| 4357245 | Water-soluble copolymer and its preparation | Friedrich Engelhardt, Ulrich Riegel, Heinz Wittkus | 1982-11-02 |
| 4341716 | Polyether polyamines, the salts thereof, process for their manufacture and their use | Helmut Diery, Wolfgang Wagemann, Joachim Weide, Reinhold Deubel | 1982-07-27 |