Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6746542 | Modifying starch with cationic polymers and use of the modified starches as dry-strength agent | Primoz Lorencak, Kurt Diehl, Norbert Mahr | 2004-06-08 |
| 6710175 | Compositions suitable as additives in the paper industry, preparation; use; and, paper comprising such | Kevin R. Anderson, Anton Esser, Lawrence E. Fosdick, Ki-Oh Hwang, Norbert Mahr +4 more | 2004-03-23 |
| 6616807 | Method for producing high dry-strength paper, pulpboard and cardboard | Rainer Dyllick-Brenzinger, Primoz Lorencak, Hubert Meixner, Peter G. Baumann, Ellen Krüger +1 more | 2003-09-09 |
| 6114435 | Preparation of aqueous solutions of polymers containing vinylamine units, which solutions have a long shelf life, and their use | Claudia Nilz, Manfred Winter, Michael Kroner, Rudolf Schuhmacher | 2000-09-05 |
| 6060566 | Graft polymers of polymers containing vinyl ester and/or vinyl alcohol units and ethylenically unsaturated compounds, their preparation and their use | Walter Denzinger, Martin Rubenacker, Claudia Nilz, Primoz Lorencak, Dietmar Monch +1 more | 2000-05-09 |
| 6048945 | Graft polymers comprising polymers, containing alkylene oxide units, and ethylenically unsaturated compounds, their preparation and their use | Walter Denzinger, Martin Rubenacker, Claudia Nilz, Primoz Lorencak, Dietmar Monch +1 more | 2000-04-11 |
| 5851300 | Cationic modification of starch and use of the cationically modified starch | Friedrich Linhart, Rudolf Schuhmacher, Heinrich Hartmann, Walter Denzinger, Manfred Niessner +3 more | 1998-12-22 |
| 5630907 | Use of hydrolyzed copolymers of N-vinylcarboxamides and monoethylenically unsaturated carboxylic acids in papermaking | Claudia Nilz, Walter Denzinger, Heinrich Hartmann, Michael Kroener, Friedrich Linhart +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, Friedrich Linhart | 1996-11-26 |
| 5554718 | Catonic urea/formaldehyde resins, their preparation and their use in the paper industry | Klaus Flory, Michael Kroener, Norbert Sendhoff | 1996-09-10 |
| 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, Friedrich Linhart | 1996-08-06 |
| 5478656 | Cationic urea/formaldehyde resins, their preparation and their use in the paper industry | Klaus Flory, Michael Kroener, Norbert Sendhoff | 1995-12-26 |
| 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, Friedrich Linhart | 1994-08-02 |
| 5262008 | Production of paper, board and cardboard in the presence of copolymers containing N-vinylformamide units | Dietmar Moench, Heinrich Hartmann, Enrique Freudenberg | 1993-11-16 |
| 4981913 | Bridged, water-soluble copolymers, their preparation and their use | Dietmar Moench, Joerg Liebe, Heinrich Hartman, Franz Merger, Manfred Schwartz | 1991-01-01 |
| 4940514 | Making paper, board and cardboard of high dry strength | Hans-Juergen Degen, Werner Auhorn, Volkmar Weberndoerfer, Michael Kroener, Heinrich Hartmann | 1990-07-10 |
| 4845223 | Fluorescent aryloxy-substituted perylene-3,4,9,10-tetracarboxylic acid diimides | Guenther Seybold | 1989-07-04 |
| 4818341 | Production of paper and paperboard of high dry strength | Hans-Juergen Degen, Sigberg Pfohl, Volkmar Weberndoerfer, Gerd Rehmer, Michael Kroener | 1989-04-04 |
| 4667417 | Preparation of aerogels | Fritz Graser | 1987-05-26 |