Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684194 | Process for urea production involving a carbon dioxide stripping step | — | 1997-11-04 |
| 5681537 | Plant for urea production involving a carbon dioxide stripping step | — | 1997-10-28 |
| 5660801 | Process and apparatus for the revamping of urea synthesis plants consisting of a stripper with ammonia | Umberto Zardi | 1997-08-26 |