Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643347 | Process for manufacture of silica granules | Waltraud Werdecker, Hartwig Schaper, Wolfgang Englisch | 1997-07-01 |
| 5610116 | Catalyst carrier and method for producing same | Waltraud Werdecker, Wolfgang Krock | 1997-03-11 |