Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7566361 | Colouring preparations | Dieter Freyberg, Karl Siemensmeyer | 2009-07-28 |
| 7176255 | Method for producing aqueous polymer dispersions containing colorants | Klemens Mathauer, Arno Boehm, Walter Maechtle, Peter Rossmanith, Sabine Kielhorn-Bayer +11 more | 2007-02-13 |
| 7074850 | Cross-linkable polyurethane block copolymers and their use in dispersion binding agent systems | Ulrike Hees, Sophia Ebert, Ruediger Sens, Hans Bohrmann, Lothar Schulz +4 more | 2006-07-11 |
| 6770331 | Colorant preparations | Manfred Mielke, Ulrike Schlosser, Rudiger Sens, Karl Siemensmeyer, Dieter Freyberg +1 more | 2004-08-03 |
| 6737122 | Method for coating substrates | Erich Beck, Karl Siemensmeyer | 2004-05-18 |
| 6727318 | Method for producing aqueous polymer dispersions containing colorants | Klemens Mathauer, Arno Bohm, Walter Machtle, Peter Rossmanith, Sabine Kielhorn-Bayer +11 more | 2004-04-27 |
| 5849361 | Methine dyes based on formylaminopyridones | Rudiger Sens, Andreas Schmidt, Karl-Heinz Etzbach | 1998-12-15 |
| 5663386 | Method for marking mineral oils with amthraquinones | Christos Vamvakaris | 1997-09-02 |
| 5627077 | Anilines as markers for mineral oils | Rainer Dyllick-Brenzinger, Ulrike Schlosser | 1997-05-06 |
| 5500141 | Magnetic ink concentrate | Claudius Kormann, Ekkehard Schwab, Karin H. Beck | 1996-03-19 |
| 5491043 | Electrostatic toners with polyamine charge stabilizers | Johannes P. Dix, Ulf Baus, Karin H. Beck | 1996-02-13 |
| 5487770 | Detection of marked mineral oils and novel azo dyes | Rainer Dyllick-Brenzinger, Ulrike Schlosser, Karin H. Beck, Gerhard Scholz | 1996-01-30 |
| 5250207 | Magnetic ink concentrate | Claudius Kormann, Ekkehard Schwab, Karin H. Beck | 1993-10-05 |
| 5144064 | Preparation of J-acid urea | Erwin Hahn, Udo Mayer, Ulrike Schloesser | 1992-09-01 |
| 5071987 | Quinoline-4-carboxylic acid derivatives | Udo Mayer | 1991-12-10 |
| 5053524 | 3-aminophenylpentane-1,5-diones | Udo Mayer, Andreas Oberlinner | 1991-10-01 |
| 4962190 | Azo dyes containing polyethyleneimine with an aniline diazo component and a hydroxynaphthalene, aminopyridine or acetoacetic coupling component | Udo Mayer | 1990-10-09 |
| 4940649 | Photopolymerizable recording materials and photoresist layers and lithographic printing plates based thereon | Reinhard Aldag, Peter Neumann, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz | 1990-07-10 |
| 4908447 | 2-,6-diphenylpyridine compounds useful as dye precursors | Udo Mayer | 1990-03-13 |