Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6303002 | Method for producing paper, pulpboard and cardboard | Friedrich Linhart, Hubert Meixner | 2001-10-16 |
| 4976888 | Antifoam based on oil-in-water emulsion | Arnold De Clercq, Wolfram Bergold, Hans-Juergen Degen | 1990-12-11 |
| 4976138 | Measuring arrangement for determining the liquid absorption of paper | Norbert Benninghoff, Manfred Jaensch, Gunter Niesar, Werner Schuster | 1990-12-11 |
| 4960361 | Separating sheetlike structures from piles | — | 1990-10-02 |
| 4952280 | Process for controlling the addition of retention aids in papermaking | Ralf Hemel | 1990-08-28 |
| 4676961 | Stabilized water-containing sodium dithionite formulations which have been rendered alkaline | Max Appl, Wilhelm Goesele, Siegfried Schreiner, Gert Treiber | 1987-06-30 |
| 4664844 | Antifoams based on oil-in-water emulsions | Wolfram Bergold | 1987-05-12 |
| 4371674 | Water soluble crosslinked ethyleneimine grafted polyamidoamine | Otto Hertel, Emil Scharf, 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, Emil Scharf | 1982-05-04 |