Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514296 | Apparatus for producing ion exchange particles charged with uranyl ions | Helmut Ringel, Erich Zimmer | 1985-04-30 |
| 4279866 | Method of producing weakly acidic cation exchange resin particles charged with uranyl ions | Helmut Ringel, Erich Zimmer | 1981-07-21 |