Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8039097 | Methods for protecting patinated surfaces of copper products and patinated copper product | — | 2011-10-18 |
| 6176905 | Process and reaction solution for producing a patina | Sonja Priggemeyer, Stefan Priggemeyer | 2001-01-23 |
| 5962116 | Copper strip or sheet with a brown cover layer and methods for its production | Christian Triquet, Wolfgang Denke, Stefan Priggemeyer | 1999-10-05 |
| 5879745 | Method for stabilizing a patina layer | Ulrich Reiter, Stefan Priggemeyer | 1999-03-09 |
| 5714052 | Method for producing brochantite patina on copper | Dirk Rode, Helmut Protzer, Ruzica Luetic | 1998-02-03 |
| 5580617 | Method for manufacturing tin-coated strips or sheets from copper or a copper alloy | Hans H. Biederer | 1996-12-03 |
| 5376190 | Method for producing a green protective coating on copper | — | 1994-12-27 |
| 5282890 | Process for producing brown covering layers on copper | Helmut Protzer, Constantin Puscasu, Albert Scherger | 1994-02-01 |