Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4526976 | Thieno[3,2-b]benzofuran and benzothiophene derivatives useful as optical brightening agents | Alec Victor Mercer, Malcolm Oates | 1985-07-02 |
| 4386200 | 7-Styryl coumarin derivatives | — | 1983-05-31 |
| 4252604 | Bis-(triazinylamino)-stilbenesulphonic acids | Hans-Rudolf Schmid | 1981-02-24 |
| 4196229 | Substituted divinyl stilbenes as optical brighteners | Juerg Heller | 1980-04-01 |
| 4182861 | Fluorescent 1,2,3-triazole derivatives of 3-phenylcoumarin | Hans Balzer, Horst Aebli | 1980-01-08 |