Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4526976 | Thieno[3,2-b]benzofuran and benzothiophene derivatives useful as optical brightening agents | Fritz Fleck, Alec Victor Mercer | 1985-07-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4526976 | Thieno[3,2-b]benzofuran and benzothiophene derivatives useful as optical brightening agents | Fritz Fleck, Alec Victor Mercer | 1985-07-02 |