Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6090928 | Process for the preparation and work-up of N-hydroxyalkylchitosans soluble in aqueous medium | Diethart Reichel, Birgit Kessler | 2000-07-18 |
| 5747468 | Cationic unsaturated saccharides and polymers prepared therefrom, and their use | Rudolf Ehrler | 1998-05-05 |
| 5500124 | Process for the purifying working-up of reaction media and/or wash media obtained during preparation of cellulose ethers | Heinz Wallisch, Ulrich Meyer-Blumenroth | 1996-03-19 |
| 5442048 | Process for the preparation of activated chitosans and their use in the preparation of chiotsan derivatives | Christoph Meister | 1995-08-15 |
| 5395930 | Alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl substituents | Uwe Bartz, Heiner Klehr | 1995-03-07 |
| 5372642 | Use of carboxymethylated methyl hydroxyethyl cellulose ethers or methyl hydroxypropyl cellulose ethers | Uwe Bartz, Heiner Klehr | 1994-12-13 |
| 5302196 | Modified cellulose ethers and the use thereof in dispersion paints | Christoph Meister, Walter Schermann, Walter Schrattenholz | 1994-04-12 |
| 4979681 | Process for grinding and simultaneous drying of moist cellulose ether products | Manfred Sponheimer, Gunther Welt, Manfred Ziegelmayer | 1990-12-25 |
| 4794166 | Process for the preparation of a hydrogel which is largely free from monomers | Friedrich Engelhardt, Manfred Schrod, Manfred Ziegelmayer, Josef Hilbig | 1988-12-27 |
| 4530747 | Photopolymerizable mixture and photopolymerizable copying material prepared therewith | Klaus Horn | 1985-07-23 |
| 4458006 | Photopolymerizable mixture and photopolymerizable copying material prepared therewith | Klaus Horn | 1984-07-03 |
| 4371606 | 2-(Halogenomethyl-phenyl)-4-halogeno-oxaxole derivatives, a process for the preparation thereof, and radiation-sensitive compositions containing these derivatives | — | 1983-02-01 |
| 4371607 | 4-Halogeno-5-(halogenomethyl-phenyl)-oxazole derivatives, a process for the preparation thereof, and radiation-sensitive compositions containing these derivatives | — | 1983-02-01 |