Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874729 | Process for the preparation of modified zeolites | — | 1989-10-17 |
| 4874730 | Process for the preparation of modified zeolites | — | 1989-10-17 |
| 4829044 | Silver catalyst and process for its preparation | Gosse Boxhoorn | 1989-05-09 |