Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6616712 | Use of compositions containing bisazo compounds for detecting fissures | Christos Vamvakaris, Karl-Heinz Etzbach, Gerhard Scholz, Claudia Krah | 2003-09-09 |
| 6340745 | Phthalocyanine and use of phthalocyanine as a marking agent | Frank Meyer, Christos Vamvakaris, Gerhard Wagenblast, Bernhard Albert | 2002-01-22 |
| 6312958 | Method for marking liquids with at least two marker substances and method for detecting them | Frank Meyer, Gerhard Wagenblast, Christos Vamvakaris | 2001-11-06 |
| 5998211 | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Bernhard Albert, Juergen Kipper, Christos Vamvakaris, Gerhard Wagenblast | 1999-12-07 |
| 5990327 | Use of aminotriarylmethanes for marking hydrocarbons and novel aminotriarylmethanes | Ulrike Schloesser | 1999-11-23 |
| 5891227 | Aqueous dye preparations | Dietrich Hoffmann, Ulrike Schlosser, Erwin Czech, Walter Kurtz, Doug R. Campbell +2 more | 1999-04-06 |
| 5827332 | Azo dyes and a method of making a hydrocarbon using an azo dye | Georg Zeidler, Gerhard Scholz, Claudia Krah, Udo Mayer | 1998-10-27 |
| 5814139 | Ballpoint pen pastes with phthalocyanine pigments | Helmut Bellaire, Erwin Czech, Walter Kurtz | 1998-09-29 |
| 5804447 | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Bernhard Albert, Juergen Kipper, Christos Vamvakaris, Gerhard Wagenblast | 1998-09-08 |
| 5697984 | Dye preparations with ethylene oxide-castor oil reaction products | Dieter Swatzina, Christos Vamvakaris, Juliane Krusemann | 1997-12-16 |
| 5663028 | Electrostatic toners containing aminodiacetic acid derivatives | Alfred Oftring, Juergen Schneider, Rainer Dyllick-Brenzinger | 1997-09-02 |
| 5616644 | Dyestuff-containing aqueous dispersions | Bernhard Schlarb, Kurt Wendel, Helmut Bellaire | 1997-04-01 |
| 5567233 | Process for preparing ballpoint pen pastes with colored metal oxide pigments | Helmut Bellaire, Claudius Kormann, Rainer Dyllick-Brenzinger | 1996-10-22 |
| 5541032 | Electrostatic toners containing phenacyl compounds | Alfred Oftring, Bernd Burkhart, Thomas Wehlage, Rainer Dyllick-Brenzinger | 1996-07-30 |
| 5529872 | Electrostatic toners containing a metal complex dye as charge stabilizer | Klaus Grychtol, Rainer Dyllick-Brenzinger | 1996-06-25 |
| 5500141 | Magnetic ink concentrate | Claudius Kormann, Ekkehard Schwab, Friedrich-Wilhelm Raulfs | 1996-03-19 |
| 5491043 | Electrostatic toners with polyamine charge stabilizers | Johannes P. Dix, Ulf Baus, Friedrich-Wilhelm Raulfs | 1996-02-13 |
| 5487770 | Detection of marked mineral oils and novel azo dyes | Rainer Dyllick-Brenzinger, Friedrich-Wilhelm Raulfs, Ulrike Schlosser, Gerhard Scholz | 1996-01-30 |
| 5478940 | Double benzimidazoles | Gunter-Rudolf Schroeder, Udo Mayer, Rainer Dyllick-Brenzinger | 1995-12-26 |
| 5431723 | Use of liquid preparations of a disazo dye in the ink jet process and the diazo dye | Rudolf Bermes, Rainer Dyllick-Brenzinger | 1995-07-11 |
| 5282894 | Use of a liquid containing IR dyes as printing ink | Bernhard Albert, Friedrich Closs, Juergen Kipper, Walter Kurtz, Rudolf Griebel | 1994-02-01 |
| 5250207 | Magnetic ink concentrate | Claudius Kormann, Ekkehard Schwab, Friedrich-Wilhelm Raulfs | 1993-10-05 |
| 5231140 | Preparation of polymers with side groups with NLO activity, and the use thereof | Heike Kilburg, Karl-Heinz Etzbach, Peter Strohriegl, Harry Mueller, Oskar Nuyken | 1993-07-27 |
| 5162545 | Malonic acid dyes and polycondensation products thereof | Karl-Heinz Etzbach, Gerhard Wagenblast | 1992-11-10 |
| 5151516 | Polymerizable perylene-3,4,9,10-tetracarbimides | Karl-Heinz Etzbach, Hans-Werner Schmidt | 1992-09-29 |