Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4423194 | Polyquaternary ammonium compounds, their preparation, their use in the production of paper and paper treatment agents containing them | Peter Haas, Gunter Kolb, Guter Sackmann, Joachim Probst | 1983-12-27 |
| 4384110 | Polyamines containing urea groups prepared from lactam or aminocarboxylic acid | Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Friedhelm Muller, Janos Muszik | 1983-05-17 |
| 4348514 | Polyamines containing urea groups | Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Friedhelm Muller, Janos Muszik | 1982-09-07 |
| 4319019 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Gunther Cramn, Knut Hammerstrom | 1982-03-09 |
| 4254255 | Aqueous reaction of polyamine with alkylene dihalide in presence of emulsifier | Wolfgang Lehmann, Friedhelm Muller | 1981-03-03 |
| 4250298 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Gunther Cramm, Knut Hammerstrom | 1981-02-10 |
| 4250299 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Gunther Cramm, Knut Hammerstrom | 1981-02-10 |
| 4250112 | Polyalkylenepolyamines containing quaternary dialkylammonium groups | Wolfgang Lehmann, Friedhelm Muller | 1981-02-10 |