Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5421872 | Dyestuffs for printing inks | Rolf Richter, Martin Michna | 1995-06-06 |
| 5131916 | Colored fluorescent polymer emulsions for marker pens: graft copolymers and fluorescent dyes in aqueous phase | Herbert Eichenauer | 1992-07-21 |
| 4776886 | Halftone gravure printing inks containing an azo dyestuff | Manfred Lorenz, Rainer Hamprecht | 1988-10-11 |
| 4750935 | Printing ink | Helmut P. Prochaska, Walter Tames, Klaus Kunde, Knud Reuter | 1988-06-14 |
| 4739042 | Halftone gravure printing inks containing pyridone azo dyestuffs | Manfred Lorenz | 1988-04-19 |
| 4453002 | Formaldehyde condensates and their preparation | Werner Maurer, Johann Zimmer | 1984-06-05 |
| 4428978 | Concentrated microcapsule suspensions for reaction copying papers | Gert Jabs, Gunther Baatz, Manfred Bock, Manfred Dahm, Christian Wegner | 1984-01-31 |
| 4404251 | Copying systems, a process for their production, and suitable printing inks for both offset and book printing | Gert Jabs, Manfred Dahm, Ulrich Nehen, Klaus Rath, Norbert Weimann | 1983-09-13 |
| 4295849 | Process for the preparation of dyestuff formulations | Konrad Nonn, Karlheinz Wolf, Reinhold Hornle | 1981-10-20 |
| 4245083 | Phenolic formaldehyde-salicylic acid condensation products | Gunther Reitz, Gunther Boehmke, Martin Meister | 1981-01-13 |
| 4209297 | Transfer printing process | Gunter Stephan, Hartmut Birmes, Erwin Plaza | 1980-06-24 |