Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6187898 | Method for carrying out polycondensation reactions | Paul Wagner, Frank Dobert, Thomas Menzel, Torsten Groth, Winfried Joentgen +2 more | 2001-02-13 |
| 6054553 | Process for the preparation of polymers having recurring agents | Torsten Groth, Winfried Joentgen, Frank Dobert, Thomas Menzel, Ursula Pentling +3 more | 2000-04-25 |
| 5977052 | Washing process using polycarboxylic acid salts | Lutz Heuer, Winfried Joentgen, Torsten Groth, Paul Wagner | 1999-11-02 |
| 5977378 | Process for the preparation of 1-alkyl-pyrazole-5-carboxylic acid esters | Nikolaus Muller, Lutz Heuer, Johannes Kanellakopoulos, Andreas Sattler | 1999-11-02 |
| 5679761 | Iminodisuccinate-containing polymers | Lutz Heuer, Winfried Joentgen, Torsten Groth, Hans-Joachim Traenckner, Nikolaus Muller +8 more | 1997-10-21 |
| 4975516 | Diaminoarylsulfones useful for the preparation of polyurethane elastomers | Gerhard Grogler, Karlfried Wedemeyer, Dieter Dieterich | 1990-12-04 |
| 4544372 | Process for improving the light fastness of polyamide dyeings | Robert Kuth, Karl Neufang, Hellmuth Pantke, Karlfried Wedemeyer | 1985-10-01 |
| 4426538 | Process for the preparation of optionally p-chlorine-substituted 2,6-diaminotoluene | Ernst Schneider, Karlfried Wedemeyer | 1984-01-17 |
| 4404400 | Process for the preparation of 4-nitrodiphenylamines | Karlfried Wedemeyer | 1983-09-13 |