Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886859 | Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use | Walter Denzinger, Heinrich Hartmann, Ulrich Gockel, Hans-Jurgen Raubenheimer, Ekhard Winkler | 1989-12-12 |
| 4827014 | 2-Hydroxy-3-aminopropionic-n,n-diacetic acid and derivatives thereof, preparation thereof, and detergents containing same | Richard Baur, Stefan Birnbach, Rolf Fikentscher, Alfred Oftring, Ekhard Winkler +1 more | 1989-05-02 |
| 4818794 | Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use | Walter Denzinger, Heinrich Hartmann, Ulrich Goeckel, Hans-Juergen Raubenheimer, Ekhard Winkler | 1989-04-04 |
| 4818795 | Polymaleic acid, its preparation and its use | Walter Denzinger, Heinrich Hartmann, Ulrich Goeckel, Ekhard Winkler, Hans-Juergen Raubenheimer | 1989-04-04 |
| 4816553 | Polyacetals, preparation thereof from dialdehydes and polyolcarboxylic acids, and use of same | Richard Baur, Rolf Fikentscher, Alfred Oftring, Wolfgang Trieselt, Paul Diessel +2 more | 1989-03-28 |