Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662781 | Elimination of nitrile impurities from polymers | Walter Denzinger, Heinrich Hartmann, Michael Kroener | 1997-09-02 |
| 5630907 | Use of hydrolyzed copolymers of N-vinylcarboxamides and monoethylenically unsaturated carboxylic acids in papermaking | Walter Denzinger, Heinrich Hartmann, Michael Kroener, Friedrich Linhart, Rudolf Schuhmacher +2 more | 1997-05-20 |
| 5599898 | Insoluble, only slightly swellable polymers containing amino groups, their preparation and their use | Heinrich Hartmann, Walter Denzinger, Michael Kroener | 1997-02-04 |