Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4272365 | Magnetic separator | Guenter Ries, Klaus-Peter Juengst, Siegfried Foerster, Franz Graf, Karl-Heinz Unkelbach +1 more | 1981-06-09 |
| 4254255 | Aqueous reaction of polyamine with alkylene dihalide in presence of emulsifier | Wilfried Lobach, Friedhelm Muller | 1981-03-03 |
| 4250298 | Polyamines containing amide groups | Friedhelm Muller, Wilfried Lobach, Gunther Cramm, Knut Hammerstrom | 1981-02-10 |
| 4250299 | Polyamines containing amide groups | Friedhelm Muller, Gunther Cramm, Knut Hammerstrom, Wilfried Lobach | 1981-02-10 |
| 4250112 | Polyalkylenepolyamines containing quaternary dialkylammonium groups | Wilfried Lobach, Friedhelm Muller | 1981-02-10 |