Issued Patents All Time
Showing 101–125 of 151 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5187248 | Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on | Gerhard Wagenblast, Wolfgang Brox, Axel Paul, Volker Bach | 1993-02-16 |
| 5162045 | Transferring dyes for thermal printing | Bernhard Albert, Ruediger Sens | 1992-11-10 |
| 5162545 | Malonic acid dyes and polycondensation products thereof | Karin H. Beck, Gerhard Wagenblast | 1992-11-10 |
| 5158928 | Azo dyes for thermotransfer printing | Volker Bach, Sabine Gruettner, Gunther Lamm, Helmut Reichelt, Ruediger Sens | 1992-10-27 |
| 5155089 | Anthraquinone dyes for thermal transfer printing | Ruediger Sens | 1992-10-13 |
| 5151516 | Polymerizable perylene-3,4,9,10-tetracarbimides | Karin H. Beck, Hans-Werner Schmidt | 1992-09-29 |
| 5147845 | Triazolopyridine dyes and thermal transfer of methine dyes | Ruediger Sens, Ernst Schefczik, Gunther Lamm, Helmut Reichelt, Matthias Wiesenfeldt | 1992-09-15 |
| 5145952 | Thiopheneazo dyes with a coupling component based on M-phenylenediamine | Heinz Eilingsfeld, Guenter Hansen, Helmut Reichelt, Ernst Schefczik | 1992-09-08 |
| 5145828 | Transfer of azo dyes | Ruediger Sens, Matthias Wiesenfeldt | 1992-09-08 |
| 5139997 | Transfer of bichromophoric cyano-containing methine dyes | Volker Bach, Ruediger Sens | 1992-08-18 |
| 5132438 | Bichromophoric methine and azamethine dyes and process for transferring them | Volker Bach, Ruediger Sens | 1992-07-21 |
| 5101035 | Merocyanine-like thiazole dyes and thermal transfer thereof | Volker Bach, Gunther Lamm, Ruediger Sens, Klaus Unterforsthuber, Rosemarie Rausch-Krebs | 1992-03-31 |
| 5097463 | Laser-optical writing and reading process using a thermally alterable reading layer containing liquid-crystalline compound | Gerhard Wagenblast, Bernd Hisgen | 1992-03-17 |
| 5093308 | Oxadiazolyl-benzene azo hydroxy-pyridone dyes for thermal transfer printing a yellow print | Ruediger Sens, Gunther Lamm | 1992-03-03 |
| 5079365 | Triazolopyridine dyes and thermal transfer of methine dyes | Rudiger Sens, Ernst Schefczik, Gunther Lamm, Helmut Reichelt, Matthias Wiesenfeldt | 1992-01-07 |
| 5071588 | Liquid-crystalline mixture containing an azulenesquaric acid dye | Wolfgang Schrott, Karin H. Beck, Peter Neumann | 1991-12-10 |
| 5064962 | Diaminothiophenes | Matthias Wiesenfeldt | 1991-11-12 |
| 5062861 | Novel navy and black disperse dye mixtures including amino-phenyl thiophene azo disperse dye and red, yellow or orange disperse dyes | Erwin Hahn, Guenter Hansen, Helmut Reichelt, Ernst Schefczik, Helmut Degen +2 more | 1991-11-05 |
| 5059684 | Azo dyes whose diazo and coupling components stem from the thiazole series | Gunther Lamm, Matthias Wiesenfeldt, Guenter Hansen, Helmut Reichelt | 1991-10-22 |
| 5037798 | Transfer of AZO dyes | Gunther Lamm, Helmut Reichelt, Ruediger Sens | 1991-08-06 |
| 5003081 | Pyrrole derivatives useful as diazo and coupling components | Juergen Pfister, Matthias Wiesenfeldt | 1991-03-26 |
| 4999026 | Transferring dyes for thermal printing: tri-cyano-vinyl aniline dyes | Bernhard Albert, Ruediger Sens | 1991-03-12 |
| 4994564 | Azo dyes with a diazo component of the 3-amino thiophene series and a coupling component of the pyridine, pyridone or pyrazole series | Helmut Reichelt, Guenter Hansen, Ernst Schefczik, Helmut Hagen, Gunther Lamm | 1991-02-19 |
| 4980081 | Polymers which form liquid-crystalline phases | Helmut Ringsdorf, Willi Kreuder, Peter Neumann, Hans-Josef Sterzel | 1990-12-25 |
| 4980495 | Trialkylamine salts of 3-chloro-1,1-dicyano-2-hydroxy-1-propene and preparation of 2-amino-4-chloro-3-cyano-5-formylthiophene | — | 1990-12-25 |