Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874504 | pH control by bulky organic bases during noble-metal exchange of zeolite catalysts | Roland von Ballmoos | 1989-10-17 |
| 4851200 | Method for removing organic residue from as-synthesized zeolites | — | 1989-07-25 |
| 4814306 | Ph control by bulky organic bases during noble-metal exchange of zeolite catalysts | Roland von Ballmoos | 1989-03-21 |