| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | German Democratic Republic | 4 | |
| #3 | Germany | 1 | |
| #4 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Biotechnology | |
| #3 | Chemical engineering | |
| #4 | Basic materials chemistry | |
| #5 | Foods and drinks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Guenther Lothar | 10 |
| #2 | Leithoff Siegfried | 3 |
| #3 | Kutzer Klaus | 3 |
| #4 | Reinbothe Achim | 3 |
| #5 | Bender Karl | 1 |
| #6 | Scharnagel Reinhard | 1 |
| #7 | Schwarzkopf Karl-Heinz | 1 |
| #8 | Wachsmuth Achim | 1 |
| #9 | Lubitzsch Peter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DD146751A3 | Process for processing process waste of urea manufacture | |
| DD154442A3 | Method for recovering ammonia and carbon dioxide | |
| DD146752A3 | Process for cleaning process waste of the urea synthesis | |
| DD142152A1 | Device for cleaning exhaust air |