Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6056967 | Method of producing water-soluble condensates and addition products containing amino groups, and use of said condensates and addition products | Ulrich Steuerle, Hubert Meixner, Wolfgang Reuther, Hartmut Kanter, Albert Hettche +2 more | 2000-05-02 |
| 5738693 | Detection of naphthylamines in mineral oils | Ulrike Schlosser, Walter Kurtz, Gunther Lamm | 1998-04-14 |
| 5663028 | Electrostatic toners containing aminodiacetic acid derivatives | Alfred Oftring, Juergen Schneider, Karin H. Beck | 1997-09-02 |
| 5627077 | Anilines as markers for mineral oils | Friedrich-Wilhelm Raulfs, Ulrike Schlosser | 1997-05-06 |
| 5614346 | Metal oxide- and metal-coated carriers for electrophotography | Jorg Adel | 1997-03-25 |
| 5567233 | Process for preparing ballpoint pen pastes with colored metal oxide pigments | Karin H. Beck, Helmut Bellaire, Claudius Kormann | 1996-10-22 |
| 5541032 | Electrostatic toners containing phenacyl compounds | Alfred Oftring, Bernd Burkhart, Thomas Wehlage, Karin H. Beck | 1996-07-30 |
| 5534378 | Carriers doubly coated with metal oxide and intended for electro-photography | Jorg Adel | 1996-07-09 |
| 5529872 | Electrostatic toners containing a metal complex dye as charge stabilizer | Klaus Grychtol, Karin H. Beck | 1996-06-25 |
| 5494964 | Polyesters based on hydroxyl-containing prepolymers of olefinically unsaturated monomers and their use as binders for electrophotographic toners | Georg Meichsner, Thomas Wuensch | 1996-02-27 |
| 5487770 | Detection of marked mineral oils and novel azo dyes | Friedrich-Wilhelm Raulfs, Ulrike Schlosser, Karin H. Beck, Gerhard Scholz | 1996-01-30 |
| 5478940 | Double benzimidazoles | Gunter-Rudolf Schroeder, Udo Mayer, Karin H. Beck | 1995-12-26 |
| 5431723 | Use of liquid preparations of a disazo dye in the ink jet process and the diazo dye | Rudolf Bermes, Karin H. Beck | 1995-07-11 |
| 5422176 | Cured particle incorporating a cured copolymer protective colloid | Bernhard Schuler, Ralf Biastoch | 1995-06-06 |
| 5352843 | Preparation of .beta.-naphthyl benzyl ether | Ulf Baus | 1994-10-04 |
| 5205838 | Liquid dye preparations: bis phenyl-azo-resorcinol in solvent for colored ribbon or ball pen ink | Heinz Hartmann, Helmut Bellaire, Georg Zeidler | 1993-04-27 |
| 5015292 | Recording fluid for the ink jet process | Horst Bruder, Udo Mayer, Steven J. Bares | 1991-05-14 |
| 4975118 | Recording fluid containing phenyl azo naphthalene dyes for the ink jet process | Udo Mayer, Horst Bruder, Steven J. Bares | 1990-12-04 |
| 4912006 | Electrostatic toner | Walter Breitschaft, Erwin Czech, Udo Mayer, Guenther Seybold, Horst Bruder | 1990-03-27 |
| 4717423 | Mixtures of dye precursors, and pressure-sensitive recording material containing these mixtures | Udo Mayer, Andreas Oberlinner | 1988-01-05 |
| 4668774 | 2-ethylhexylamine salts of anionic monoazo dyes | Hermann Loeffler | 1987-05-26 |
| 4612015 | Liquid dye formulations containing organic carbonates | — | 1986-09-16 |