Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6491786 | Welding head for heated tool welding | — | 2002-12-10 |
| 6488793 | Device and method for heated tool welding | Joachim Natrop | 2002-12-03 |
| 5744001 | Aqueous pigment slurries for production of filler-containing paper | Friedrich Linhart, Guenter Scherr, Wolfgang Reuther, Primoz Lorencak | 1998-04-28 |
| 5641855 | Water-soluble condensation products of amino-containing compounds and crosslinkers, preparation thereof and use thereof | Guenter Scherr, Wolfgang Reuther, Friedrich Linhart, 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, Friedrich Linhart +2 more | 1997-05-20 |
| 5536370 | Condensates of polyalkylenepolyamines, their preparation and their use in papermaking | Guenter Scherr, Wolfgang Reuther, Primoz Lorencak, Friedrich Linhart, Juergen Weiser | 1996-07-16 |
| 5292800 | Water-in-oil polymer emulsions | Heinrich Hartmann, Hans-Ulrich Wekel | 1994-03-08 |
| 5290880 | Preparation of finely divided, water-soluble polymers containing vinylamine units | Michael Kroener, Enrique Freudenberg, Heinrich Hartmann, Norbert Sendhoff | 1994-03-01 |
| 5262008 | Production of paper, board and cardboard in the presence of copolymers containing N-vinylformamide units | Heinrich Hartmann, Enrique Freudenberg, Andreas Stange | 1993-11-16 |
| 5225088 | Use of nonhydrolyzed copolymers containing N-vinylformamide units as flocculants and drainage aids | Heinrich Hartmann, Karl-Heinz Buechner | 1993-07-06 |
| 4981913 | Bridged, water-soluble copolymers, their preparation and their use | Andreas Stange, Joerg Liebe, Heinrich Hartman, Franz Merger, Manfred Schwartz | 1991-01-01 |