Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4650863 | Preparation of water-soluble mixed cellulose ethers | Utz-Hellmuth Felcht | 1987-03-17 |
| 4550161 | Preparing water-soluble mixed cellulose ethers | Utz-Hellmuth Felcht | 1985-10-29 |
| 4337328 | Acrylic polymers having a high swellability in water | Arno Holst, Eberhard Perplies | 1982-06-29 |