Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6942805 | Sugar juice decolorization by means of mondisperse anion exchangers | Hans-Karl Soest, Ulrich Schnegg, Martin Gladysch | 2005-09-13 |
| 6750259 | Process for preparing gel-type cation exchangers | George Dimotsis, Wolfgang Podszun | 2004-06-15 |
| 6723881 | Method for conditioning ion exchangers | Michael Bödiger, Rainer Neumann, Frieder Heydenreich, Michael Prein, Gerhard Fennhoff +3 more | 2004-04-20 |
| 6699913 | Process for preparing monodisperse anion exchangers having strongly basic functional groups | Ulrich Schnegg, Rudiger Seidel, Hans-Karl Soest, Alfred Mitschker, Holger Lutjens | 2004-03-02 |
| 6696503 | Process for preparing crosslinked ion exchangers based on unsaturated aliphatic nitriles | Michael Happ, Ralf-Jurgen Born, Ulrich Schnegg, Hans-Karl Soest, Wolfgang Zarges | 2004-02-24 |
| 6667349 | Method for producing osmotically and mechanically stable gel-like anion exchangers | Holger Lutjens, Georg Martin, Alfred Mitschker, Michael Holzbrecher | 2003-12-23 |
| 6649663 | Process for preparing monodisperse ion exchangers having chelating functional groups and the use thereof | Werner Struver, Ulrich Schnegg, Bruno Hees, Bernhard Lehmann, Holger Lutjens | 2003-11-18 |
| 6646017 | Process for the preparation of low-bleeding cation exchangers | Rudolf Wagner, Olaf Halle, Klaus Rall, Holger Lutjens | 2003-11-11 |
| 6610753 | Process for preparing selective ion exchangers | Holger Lutjens, Klaus Rall, Axel Ingendoh | 2003-08-26 |
| 6329435 | Process for preparing monodisperse, crosslinked bead polymers having thiourea groups and their use for adsorbing metal compounds | Werner Struver, Ulrich Schnegg, Heiko Hoffmann, Dieter Mauer, Bernhard Lehmann +2 more | 2001-12-11 |
| 6222066 | Process for decreasing the chlorine content of organic isocyanates | Karsten Danielmeier, Harald Leps, Dieter Mager, Reinhard Halpaap, Martin Brahm +1 more | 2001-04-24 |
| 5612383 | Weakly basic anion exchangers, processes for their preparation by aminolysis and their use for removing sulphate ions from aqueous liquids | Harold Heller, Franz-Rudolf Minz, Alfred Mitschker, Heiko Hoffmann | 1997-03-18 |
| 5464875 | Process for preparing weakly-basic anion exchangers and reagents suitable for this purpose | Stefan Antons, Guido Steffan, Alfred Mitschker, Werner Struver, Holger Lutjens | 1995-11-07 |
| 5441646 | Process of removing sulfate ions from water with a poly(meth)acrylamide exchange resin | Harold Heller, Franz-Rudolf Minz, Alfred Mitschker, Heiko Hoffmann | 1995-08-15 |
| 4952608 | Process for preparing synthetic resins having anion exchanger properties by amidomethylating a backbone polymer containing aromatic nuclei with a specially prepared N-hydroxymethyl phthalimide | Peter M. Lange | 1990-08-28 |
| 4933436 | Process for the preparation of stable aqueous solutions of anionic dyestuffs by conducting diazotization in the presence of an aromatic sulphonic acid | Joachim Wolff, Karl-Heinz Wolf | 1990-06-12 |
| 4754020 | Process for preparing aromatic diazonium salts by diazotation of amines | Joachim Wolff, Karlheinz Wolf, Peter M. Lange | 1988-06-28 |
| 4702744 | Process for the preparation of concentrated solutions of anionic dyestuffs and dyestuff additives by cation exchange with cation exchange resin | Joachim Wolff, Jochen Koll, Karlheinz Wolf, Peter M. Lange | 1987-10-27 |
| 4587347 | N-phenyl-N'-vinylethyleneureas | Hans-Josef Buysch, Peter M. Lange, Peter Mues | 1986-05-06 |
| 4511722 | Process for preparing cyclic N-vinylacylamines | Heinrich Krimm, Hans-Josef Buysch, Peter M. Lange | 1985-04-16 |