Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6228964 | Water soluble, powdered, cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide essentially free of bifunctional compounds | Hans-Georg Hartan | 2001-05-08 |
| 5512646 | Water soluble powdered cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide essentially free of bifunctional compounds | Hans-Georg Hartan | 1996-04-30 |
| 5297740 | Process for the production of polyacrylic acids | Andreas Gebauer | 1994-03-29 |
| 5292404 | Process for trash removal or pitch-like resin control in the paper manufacture | Hans-Georg Hartan | 1994-03-08 |
| 5241011 | Process for the production of polyacrylic acids | Andreas Gebauer | 1993-08-31 |
| 5176797 | Manufacturing paper employing a polymer of acrylic or methacrylic acid | Hans-Georg Hartan | 1993-01-05 |
| 4980437 | Acrylic copolymers for re-tanning | Manfred Kaussen, Dolf Stockhausen, Hans-Georg Hartan | 1990-12-25 |
| 4813968 | Retanning process | Manfred Kaussen, Dolf Stockhausen, Hans-Georg Hartan | 1989-03-21 |
| 4605740 | Process for the production of N-substituted acrylic acid amides | — | 1986-08-12 |
| 4555581 | Process for the production of 7-oxabicyclo (2.2.1)hept-5-ene derivatives | — | 1985-11-26 |