Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6306250 | Method of removing capsule oils from self-copying paper | Bernhard Nellessen, Berthold Schreck, Sabine Heinen, Bodo Hilterhaus, Dieter Baumgarten | 2001-10-23 |
| 6057375 | Use of alkoxylation products of epoxidized fats as antifoaming agents | Horst-Werner Wollenweber, Dieter Kaps, Bernhard Nellessen, Rita Koester, Wolfgang Drees +1 more | 2000-05-02 |
| 5914006 | Process for controlling the deposit of adhesive impurities from paper material suspensions | Bernhard Nellessen, Rita Koester, Berthold Schreck, Peter Daute | 1999-06-22 |
| 5725730 | Aqueous dispersions containing carboxylic acids and/or resinic acids for deinking printed wastepaper | Heinz Smolka, Klaus Lehmann, Hans Hawel, Dieter Schraml | 1998-03-10 |
| 5614062 | Process for controlling the sedimentation of sticky impurities from paper stock suspensions | Heinz-Guenther Schulte, Dieter Kaps | 1997-03-25 |
| 5512134 | Process for removing printing inks from printed wastepaper or from paper circuit waters | Peter Daute, Berthold Schreck | 1996-04-30 |
| 5474655 | Process for controlling the deposition of stickies from paper stock suspensions | Heinz-Guenther Schulte, Dieter Kaps | 1995-12-12 |
| 5403440 | Use of compounds containing polyether chains prepared from epoxidized carboxylic acid derivatives for the removal of printing inks from wastepaper | Peter Daute, Berthold Schreck | 1995-04-04 |
| 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 |
| 5238533 | Flotation process for removing fillers from wastepaper in the presence of polymers and copolymers | Konrad Engelskirchen, Herbert Fischer, Doris Oberkobusch, Ludwig Schieferstein | 1993-08-24 |
| 5232551 | Process for the flotation of fillers from deinked waste paper using organic phosphoric acid esters | Rainer Hoefer, Wolfgang von Rybinski | 1993-08-03 |
| 5227020 | Process for regenerating wastepaper using a double layer hydroxide formed in situ | Helmut Endres, Maria Liphard, Andreas Arnold, Guenter Geismar | 1993-07-13 |
| 5221433 | Deinking wastepaper using alkoxylation product of carboxylic acid containing an OH group and alkylene oxide | Peter Daute, Gerhard Stoll | 1993-06-22 |