Issued Patents All Time
Showing 26–50 of 93 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5620748 | Use of graft polymers for fatliquoring and filling leather and fur skins | Hermann Birkhofer, Peter Danisch, Heinrich Hartmann, Michael Kneip | 1997-04-15 |
| 5599898 | Insoluble, only slightly swellable polymers containing amino groups, their preparation and their use | Heinrich Hartmann, Michael Kroener, Claudia Nilz | 1997-02-04 |
| 5578678 | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use | Heinrich Hartmann, Michael Kroener, Claudia Nilz, Friedrich Linhart, Andreas Stange | 1996-11-26 |
| 5574113 | Polycocondensates based on aspartic acid, their preparation and their use | Matthias Kroner, Gunnar Schornick, Richard Baur, Alexander Kud, Birgit Potthoff-Karl +1 more | 1996-11-12 |
| 5543459 | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use | Heinrich Hartmann, Michael Kroener, Claudia Nilz, Friedrich Linhart, Andreas Stange | 1996-08-06 |
| 5506315 | Preparation of copolymers of monoethylenically unsaturated monomers containing acid groups and N-vinyllactams | Harald Meyer, Axel Sanner, Heinrich Hartmann | 1996-04-09 |
| 5494535 | Modification of metal surfaces | Harald Keller, Gerhard Hoffmann, Rainer Fassler | 1996-02-27 |
| 5433752 | Use of rection products of Homo- or copolymers based on monoethylenically unsaturated dicarboxylic anhydrides with amines or alcohols for fatliquoring and filling leather and fur skins | Hermann Birkhofer, Peter Danisch, Heinrich Hartmann, Norbert Greif, Knut Oppenlaender | 1995-07-18 |
| 5425784 | Polymeric tanning agents | Heinrich Hartmann, Brigitte Wegner | 1995-06-20 |
| 5424445 | Alkoxylation products | Johan H. Hendrick ter Maat, Marion Meyer, Knut Oppenlaender, Michael Zirnstein, Lothar Franz | 1995-06-13 |
| 5410053 | Rhodamine derivatives | Erwin Hahn, Claudia Kraeh, Udo Mayer, Bernhard Albert | 1995-04-25 |
| 5352729 | Use of pigment formulations for the preparation of pastes, printing inks and coatings | Hermann Birkhofer, Heinrich Hartmann, Juan Antonio Gonzalez Gomez, Paul Guenthert, Joachim Jesse +4 more | 1994-10-04 |
| 5334287 | Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use | Heinrich Hartmann, Michael Kroener, Claudia Nilz, Friedrich Linhart, Andreas Stange | 1994-08-02 |
| 5286263 | Use of copolymers based on long-chain alkyl vinyl ethers and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent | Ortwin Schaffer, Herbert Bay, Karl Stork, Norbert Greif, Knut Oppenlaender +1 more | 1994-02-15 |
| 5279613 | Copolymers based on long-chain olefins and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent | Ortwin Schaffer, Herbert Bay, Karl Stork, Norbert Greif, Knut Oppenlaender +1 more | 1994-01-18 |
| 5266165 | Paper sizing using copolymers of long-chain olefins and maleic anhydride in the form of the semiamides with morpholine | Arnold DeClercq, Norbert Greif, Heinrich Hartmann, Knut Oppenlaender, Ulrich Riebeling | 1993-11-30 |
| 5232603 | Use of water-soluble copolymers of monoethylenically unsaturated carboxylic acids and vinylimidazoles or derivatives thereof for water treatment | Heinrich Hartmann, Charalampos Gousetis, Ulrich Goeckel, Alfred Ruland | 1993-08-03 |
| 5227446 | Graft copolymers of monosaccharides, oligosaccharides, polysaccharides and modified polysaccharides, the preparation thereof, and their use | Heinrich Hartmann, Alexander Kud, Richard Baur, John Feldmann, Hans-Juergen Raubenheimer | 1993-07-13 |
| 5217813 | Polyethyleneimine and polyvinylamine derivatives, aluminum-based substrate materials coated with these derivatives and the use thereof for the production of offset printing plates | Joachim Roser, Juergen Mohr, Armin Lange, Knut Oppenlaender, Thomas Loerzer | 1993-06-08 |
| 5175361 | Preparation of copolymers of monoethylenically unsaturated monocarboxylic acids and dicarboxylic acids | Heinrich Hartmann, Wolfgang Trieselt, Albert Hettche, Rolf Schneider, Hans-Juergen Raubenheimer | 1992-12-29 |
| 5145559 | Production of paper, board and cardboard | Werner Auhorn, Friedrich Linhart, Primoz Lorencak, Michael Kroener, Norbert Sendhoff +1 more | 1992-09-08 |
| 5126395 | Preparation of stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides | Lutz End, Michael Kroener, Norbert Sendhoff, Enrique Freudenberg, Friedrich Linhart +2 more | 1992-06-30 |
| 5126069 | Water-soluble or -dispersible, oxidized polymer detergent additives | Alexander Kud, Richard Baur, Angelika Funhoff, Heinrich Hartmann, Hans-Juergen Raubenheimer | 1992-06-30 |
| 5124181 | Copolymers based on long-chain unsaturated esters and ethylenically unsaturated carboxylic acids for making leather and furs water repellent | Ortwin Schaffer, Herbert Bay, Karl Stork, Norbert Greif, Knut Oppenlaender +1 more | 1992-06-23 |
| 5098521 | Production of paper, board and cardboard from paper stocks containing foreign materials | Enrique Freudenberg, Friedrich Linhart, Rainer Tresch, Heinrich Hartmann, Michael Kroener +1 more | 1992-03-24 |