Issued Patents All Time
Showing 1–25 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8133543 | Method for improving printability on paper or paper products with the aid of ink-jet printing method | Rudi Mulder, Andreas Hopf, Klaus Bohlmann | 2012-03-13 |
| 7641765 | Method for production of coated paper with extreme whiteness | Thierry Blum, Stephan Frenzel | 2010-01-05 |
| 7604713 | Method for producing creped paper | Anton Esser, Detlef Kannengiesser | 2009-10-20 |
| 6969444 | Paper coating slip containing n-vinylformamide | Bernd Dirks, Heinrich Ullrich, Thierry Blum, Norbert Mahr, Stefan Frenzel +1 more | 2005-11-29 |
| 6673206 | Method of producing paper, paperboard and cardboard | Bernd Dirks, Rainer Tresch, Bernhard Mohr, Dietrich Fehringer | 2004-01-06 |
| 6303002 | Method for producing paper, pulpboard and cardboard | Jaroslav Melzer, Hubert Meixner | 2001-10-16 |
| 6190503 | Process for cleaning wastewater and recirculating water in paper production, de-inking and bleaching of pulp | Manfred Niessner, Martin Rubenacker, Claudia Nilz | 2001-02-20 |
| 6132558 | Process for producing paper and cardboard | Rainer Dyllick-Brenzinger, Hubert Meixner, Dietmar Monch, Klaus-Dieter Gerber, Bernd Dirks +1 more | 2000-10-17 |
| 5851300 | Cationic modification of starch and use of the cationically modified starch | Andreas Stange, Rudolf Schuhmacher, Heinrich Hartmann, Walter Denzinger, Manfred Niessner +3 more | 1998-12-22 |
| 5744001 | Aqueous pigment slurries for production of filler-containing paper | Dietmar Moench, Guenter Scherr, Wolfgang Reuther, Primoz Lorencak | 1998-04-28 |
| 5695610 | Aqueous pigment slurries and their use in the production of filler-containing paper | Werner Auhorn, Dietmar Monch, Jürgen Weiser, Primoz Lorencak | 1997-12-09 |
| 5641855 | Water-soluble condensation products of amino-containing compounds and crosslinkers, preparation thereof and use thereof | Guenter Scherr, Wolfgang Reuther, Dietmar Moench, Juergen Weiser | 1997-06-24 |
| 5630907 | Use of hydrolyzed copolymers of N-vinylcarboxamides and monoethylenically unsaturated carboxylic acids in papermaking | Claudia Nilz, Walter Denzinger, Heinrich Hartmann, Michael Kroener, Rudolf Schuhmacher +2 more | 1997-05-20 |
| 5578678 | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use | Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz, Andreas Stange | 1996-11-26 |
| 5543459 | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use | Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz, Andreas Stange | 1996-08-06 |
| 5536370 | Condensates of polyalkylenepolyamines, their preparation and their use in papermaking | Guenter Scherr, Wolfgang Reuther, Primoz Lorencak, Dietmar Moench, Juergen Weiser | 1996-07-16 |
| 5334287 | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use | Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz, Andreas Stange | 1994-08-02 |
| 5145559 | Production of paper, board and cardboard | Werner Auhorn, Primoz Lorencak, Michael Kroener, Norbert Sendhoff, Walter Denzinger +1 more | 1992-09-08 |
| 5126395 | Preparation of stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides | Lutz End, Walter Denzinger, Michael Kroener, Norbert Sendhoff, Enrique Freudenberg +2 more | 1992-06-30 |
| 5098521 | Production of paper, board and cardboard from paper stocks containing foreign materials | Enrique Freudenberg, Rainer Tresch, Heinrich Hartmann, Walter Denzinger, Michael Kroener +1 more | 1992-03-24 |
| 5046853 | Measuring the degree of dispersion in flowing suspensions | Ralf Hemel | 1991-09-10 |
| 4784724 | Making paper which has a high dry strength | Sigberg Pfohl, Volkmar Weberndoerfer, Heinrich Hartmann | 1988-11-15 |
| 4772359 | Production of paper, board and cardboard | Hans-Juergen Degen, Werner Auhorn, Michael Kroener, Heinrich Hartmann, Wilfried Heide | 1988-09-20 |
| 4749444 | Production of paper and cardboard | Rudolf Lorz, Werner Auhorn, Manfred Matz | 1988-06-07 |
| 4623699 | Preparation of linear, basic polymer powders | Fritz Brunnmueller, Michael Kroner, Heinrich Hartmann, Klaus Pfitzner | 1986-11-18 |