Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846892 | Tetrachloroperylene-3,4,9,10-tetracarboxylic acid diimide pigment and its use | Georg Henning, Erwin Hahn, Peter Hauser | 1989-07-11 |
| 4801693 | Substituted sulfobenzene and triazine-containing reactive dyes | Ortwin Schaffer | 1989-01-31 |
| 4798887 | Azo dyes of methylaniline disulfonic acid coupled with naphthylamine sulfonic acid | Heinz-Wolfgang Krueger, Hartmut Lardon | 1989-01-17 |