Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831140 | Process for the preparation of arylimides of perylene-3,4,9,10-tetracarboxylic acid | Ernst Spietschka | 1989-05-16 |
HT
Helmut Troster
Overall (1989): #106,031 of 140,708Top 80%
1
Patents 1989