Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5455352 | Preparation of N-(2-hydroxyethyl)-piperazine | Michael Huellmann, Rainer Becker | 1995-10-03 |
| 4567303 | Process and apparatus for preparing or reacting alkanolamines | Guenter Boettger, Hans Hammer, Otto Hertel, Gerhard Jeschek, Herbert Mueller +1 more | 1986-01-28 |
| 4450045 | Preparation of water-soluble, nitrogen-containing condensates and their use in papermaking | Otto Hertel, Friedrich Linhart | 1984-05-22 |
| 4371674 | Water soluble crosslinked ethyleneimine grafted polyamidoamine | Otto Hertel, Jaroslav Melzer, Rolf Fikentscher | 1983-02-01 |
| 4328142 | Preparation of water-soluble condensates and their use as crosslinking agents for the preparation of papermaking aids | Otto Hertel, Jaroslav Melzer | 1982-05-04 |
| 4277422 | Vulcanization activator | Herbert Mueller, Gerhard Paulus, Hubert Schoeppl | 1981-07-07 |