Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362363 | Aqueous dispersions containing alkaline earth soaps and/or alkaline earth resin soaps for deinking printed wastepaper | Heinz Smolka, Klaus Lehmann, Hans Hawel, Dieter Schraml | 1994-11-08 |
| 5308448 | Process for the flotation of fillers from deinked waste paper in the presence of surfactants containing sulfonate groups | Ansgar Behler, Rainer Hoefer, Wolfgang von Rybinski | 1994-05-03 |
| 5286346 | Deinking of wastepaper with quaternized hydroxyethyl cellulose | Konrad Engelskirchen, Herbert Fischer, Doris Oberkobusch, Ludwig Schieferstein | 1994-02-15 |