Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6380139 | Bisdithiophosphoric acid derivatives as lubricant additives | Rolf Schumacher | 2002-04-30 |
| 6013703 | Stabilizer combination for chlorine-containing polymers | Karl-Josef Kuhn, Wolfgang Wehner | 2000-01-11 |
| 5969015 | Monomeric and oligomeric bisphosphites as stabilisers for polyvinyl chloride | Karl-Josef Kuhn, Wolfgang Wehner | 1999-10-19 |
| 5804622 | Monomeric N-piperidinylmelamines as stabilizers for chlorine-containing polymers | Wolfgang Wehner, Karl-Josef Kuhn, Valerio Borzatta, Gerhard Rytz | 1998-09-08 |
| 5670563 | Stabilised chlorine-containing polymer compositions | Johannes Kaufhold | 1997-09-23 |
| 5516827 | Stabilized, chlorine-containing polymer compositions | Johannes Kaufhold | 1996-05-14 |
| 5401845 | Asymmetric aryl phosphites | Rita Pitteloud, Peter Hofmann, Rudolf Maul, Volker Schenk, Eduard Troxler | 1995-03-28 |
| 5362419 | Dithiophosphoric acid derivatives as lubricant additives | Rolf Schumacher | 1994-11-08 |
| 5360563 | Trisamidodithionodiphospates | Rolf Schumacher | 1994-11-01 |
| 5322871 | Asymmetric aryl phosphites | Rita Pitteloud, Peter Hofmann, Rudolf Maul, Volker Schenk, Eduard Troxler | 1994-06-21 |
| 5308902 | Biphosphites | Holger Andreas, Alfred Renner | 1994-05-03 |
| 5167844 | Lubricant formulations | Rolf Schumacher | 1992-12-01 |
| 4917809 | High-temperature lubricants | Rolf Schumacher | 1990-04-17 |
| 4639482 | Phosphoric acid compounds as co-stabilizers for Me(II)-carboxylates and/or Me(II)-phenolates in PVC | Horst Muller, Wolfgang Wehner | 1987-01-27 |
| 4544492 | Lubricant compositions | Rolf Schumacher | 1985-10-01 |
| 4492661 | Process for producing triarylphosphites | Rudolf Maul, Eberhard Otto | 1985-01-08 |
| 4440696 | Process for producing triarylphosphites | Rudolf Maul, Eberhard Otto | 1984-04-03 |
| 4424173 | Process for producing O,O-diesters of thiophosphorus acid | — | 1984-01-03 |
| 4376054 | 1,3,2-Dioxaphospholanes as lubricant additives and lubricants containing same | — | 1983-03-08 |
| 4341722 | 2-Thiono-(2H) [1,3,2] dioxaphosphorinanes (phospholanes) | — | 1982-07-27 |
| 4312818 | Process for producing triarylphosphites | Rudolf Maul, Eberhard Otto | 1982-01-26 |
| 4290941 | Stabilization systems from triarylphosphites and phenols | Hans J. Lorenz, Helmut Linhart | 1981-09-22 |
| 4251469 | Sulphur-containing esters of phosphoric acid | Joachim Lorenz | 1981-02-17 |
| 4197209 | Lubricant compositions containing sulfur-containing esters of phosphoric acid | Joachim Lorenz | 1980-04-08 |
| 4189453 | Processes for the production of sulphur-containing esters of phosphoric acid and phosphorous acid | Joachim Lorenz, Eberhard Otto, Rudolf Maul | 1980-02-19 |