Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5584946 | Chromium-free conversion coating treatment of aluminum | Uwe Karmaschek, Achim Roland, Hubert Vennschott | 1996-12-17 |
| 4844744 | Liquid, phosphate-free single phase degreasing compositions | Herbert Leiter, Dieter Brodalla, Frantisek Jost, Andreas Buhl | 1989-07-04 |
| 4445983 | Sealing anodically produced oxide layers, on aluminum | Hans J. Gohausen, Winfried Kirchhoff, Jurgen Lindener | 1984-05-01 |