Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197126 | Nickel-free phosphating process | Karl-Heinz Gottwald, Matthias Hamacher, Jan-Willem Brouwer | 2001-03-06 |
| 5961809 | Chromium-free process for improving paint adhesion after thin-layer anodization | Andreas Nowak | 1999-10-05 |
| 5935656 | Short duration hot seal for anodized metal surfaces | Torsten Koerner, Josef Kresse, Juergen Lindener | 1999-08-10 |
| 5891269 | Method of compacting anodized metals with lithium and fluoride-containing solutions without using heavy metals | Torsten Koerner, Josef Kresse, Juergen Lindener | 1999-04-06 |
| 5792283 | Nickel-free phosphating process | Karl-Heinz Gottwald, Karl-Dieter Brands, Jan-Willem Brouwer, Bernd Mayer | 1998-08-11 |
| 5350517 | Method of recycling phosphating sludges | Willi Buchmeier | 1994-09-27 |
| 5207840 | Process for preparing zinc phosphate coatings containing manganese and magnesium | Joerg Riesop, Karl-Heinz Gottwald | 1993-05-04 |
| 5112414 | Titanium free composition and process for activating metal surfaces prior to zinc phosphating | Karl-Dieter Brands, Helmut Endres, Peter Christophliemk | 1992-05-12 |
| 5039362 | Titanium free composition and process for activating metal surfaces prior to zinc phosphating | Karl-Dieter Brands, Helmut Endres, Peter Christophliemk | 1991-08-13 |
| 5026440 | Chromium free treatment before coating metal surfaces | Cornelia Finnenthal, Roland Morlock | 1991-06-25 |
| 4957568 | Composition and process for activating metal surfaces prior to zinc phosphating and process for making said composition | Helmut Endres, Peter Christophliemk, Karl-Dieter Brands, Joerg Riesop | 1990-09-18 |
| 4288225 | Fluid, cold-stable, two-component washing compositions and method of washing textiles | Wolfgang Bechstedt | 1981-09-08 |