Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667401 | Method for producing heterocyclic compounds | Uwe Stelzer | 2003-12-23 |
| 6211379 | Process for preparing heterocyclic compounds | Reinhard Lantzsch, Werner Lindner, Klaus Jelich | 2001-04-03 |
| 6124504 | Process for preparing 4-hydroxyanilines | Achim Hupperts, Karl Steinbeck, Uwe Stelzer, Reinhard Lantzsch | 2000-09-26 |
| 5948930 | Process for preparing O-alkyl, O-alkylphosphorochloridothioates | David M. Mayes, Daniel M. Wasleski, Gerd Grah | 1999-09-07 |
| 5162529 | Process for the preparation of 5-hydroxy-3,4,5,6-tetrahydro-pyrimidine derivatives | Reinhard Lantzsch | 1992-11-10 |
| 4537730 | Preparation of O,S-dimethyl-thiolophosphoric acid amide | Peter Feyen, Egon Kohler | 1985-08-27 |
| RE31381 | Process for the preparation of propylene oxide | Gunter Prescher, Gerd Schreyer, Otto Weiberg, Rolf Wirthwein, Helmut Waldmann +2 more | 1983-09-13 |
| 4387252 | Process for the preparation of polyhydric phenols | Christoph Jupe, Helmut Waldmann | 1983-06-07 |
| 4369096 | Process for the purification of epoxides | Helmut Waldmann, Rolf Wirthwein, Willi Hofen | 1983-01-18 |
| 4360682 | Stabilizing caprolactones with dihydroxybenzenes | Herbert Klenk, Rolf Wirthwein, Helmut Waldmann | 1982-11-23 |
| 4344897 | Process for the preparation of percarboxylic acid solutions | Ralf Goedecke, Willi Hofen, Gerd Siekmann | 1982-08-17 |
| 4341709 | Preparation of .epsilon.-caprolactone | Willi Hofen, Herbert Klenk, Gerd Schreyer, Otto Weiberg, Helmut Waldmann +2 more | 1982-07-27 |
| RE30945 | Process for the preparation of propylene oxide | Guter Prescher, Gerd Schreyer, Otto Weiberg, Rolf Wirthwein, Helmut Waldmann +2 more | 1982-05-25 |
| 4324925 | Process for the preparation of polyhydric phenols | Christoph Jupe, Helmut Waldmann | 1982-04-13 |
| 4214105 | Process for the hydroxylation of phenol | Helmut Waldmann, Wulf Schwerdtel, Wolfgang Swodenk | 1980-07-22 |
| 4212809 | Process for the preparation of 5-(oxiranylmethyl)-1,3-benzodioxole | Gebhard Rauleder, Helmut Waldmann, Volker Mues | 1980-07-15 |
| 4182917 | Process for the preparation of polyhydric phenols | Helmut Waldmann, Wulf Schwerdtel, Wolfgang Swodenk | 1980-01-08 |
| 4182918 | Process for the preparation of polyhydric phenols | Helmut Waldmann, Wulf Schwerdtel, Wolfgang Swodenk | 1980-01-08 |