Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12173163 | Pigment mixture | Christoph Schmidt, Carsten Plueg, Sabine Schoen | 2024-12-24 |
| 7273058 | Method for simultaneously dyeing and permanent shaping of hair | Dieter Schonert, Anette Schmidt-Hoerr | 2007-09-25 |
| 6945254 | Method for simultaneously dyeing and permanent shaping of hair | Dieter Schonert, Anette Schmidt-Hoerr | 2005-09-20 |
| 5865853 | Composition for dyeing keratin fibers containing vegetable dyes, a direct dye compound and oil and method of dyeing hair using same | Manfred Schmitt, Wolfgang Balzer, Henk Niessink | 1999-02-02 |
| 4659557 | Process for producing ferrous sulphate in granule form | Gunter Ritter | 1987-04-21 |
| 4464479 | Method for treating red mud | Gunter Ritter, Paul Lazik | 1984-08-07 |