Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5725730 | Aqueous dispersions containing carboxylic acids and/or resinic acids for deinking printed wastepaper | Heinz Smolka, Klaus Lehmann, Dieter Schraml, Klaus Hornfeck | 1998-03-10 |
| 5362363 | Aqueous dispersions containing alkaline earth soaps and/or alkaline earth resin soaps for deinking printed wastepaper | Heinz Smolka, Klaus Lehmann, Dieter Schraml, Klaus Hornfeck | 1994-11-08 |
| 4971656 | Flotation process for deinking printed waste paper | Klaus Lehmann, Andreas Domsch, Gregor Schuster | 1990-11-20 |
| 4959123 | Process for deinking printed waste paper | Klaus Lehmann, Andreas Domsch | 1990-09-25 |