Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7847073 | Method for producing a liquid formulation of salts of sulphonic-acid azo dyes | Juergen Decker, Helmut Reichelt, Ingo Klopp, Armin Diefenbacher, Hartwig Voss | 2010-12-07 |
| 7331998 | Liquid formulations of direct dyes | Juergen Decker, Gero Nordmann, Ingo Klopp, Helmut Reichelt, Christoph Bomba | 2008-02-19 |
| 7160336 | Liquid formulations of direct dyes | Gero Nordmann, Helmut Reichelt, Ingo Klopp | 2007-01-09 |
| 5478940 | Double benzimidazoles | Udo Mayer, Karin H. Beck, Rainer Dyllick-Brenzinger | 1995-12-26 |
| 5478948 | Benzimidazoles and their use as charger stabilizers | Udo Mayer | 1995-12-26 |
| 5338639 | Electrostatic toner containing a keto compound as a charge stabilizer | Udo Mayer | 1994-08-16 |
| 5175260 | Disazo dyes with hydroxysulfonylnaphthalene coupling components | Udo Mayer | 1992-12-29 |
| 5051504 | Doubled triphenylmethane dyes having bis acylpiperazine linkage | Erwin Hahn, Walter Breitschaft, Udo Mayer | 1991-09-24 |
| 4620029 | Method for making oxalic acid diesters | Ehrenfried Baumgartner | 1986-10-28 |