Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801746 | Process for the preparation of urea | — | 1989-01-31 |
| 4183810 | Process and device for the biological purification of waste water | Jan A. L. Thissen | 1980-01-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801746 | Process for the preparation of urea | — | 1989-01-31 |
| 4183810 | Process and device for the biological purification of waste water | Jan A. L. Thissen | 1980-01-15 |