Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7314671 | Chromium(VI)-free conversion layer and method for producing it | Patricia Preikschat, Rolf Jansen | 2008-01-01 |
| 6946201 | Chromium (VI)-free conversion layer and method for producing it | Patricia Preikschat, Rolf Jansen | 2005-09-20 |
| 6287704 | Chromate-free conversion layer and process for producing the same | Patricia Preikschat, Rolf Jansen | 2001-09-11 |