Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5981773 | Preparation of perylene-3,4-dicarboxylic anhydrides | Heinz Langhals, Markus Speckbacher | 1999-11-09 |
| 5886183 | Naphthalenelactamimide fluorescence dyes | Heinz Langhals | 1999-03-23 |