Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5192640 | Process for preparing 7-hydroxy-1,2-naphthoquinone-2-diazide-4-sulfonic acid or salts thereof | Siegfried Scheler, Klaus Bergmann | 1993-03-09 |
| 5162190 | 1,2-naphthoquinone-2-diazide-sulfonic acid amides and photosensitive compositions containing these compounds | Wolfgang Zahn, Hartmut Steppan | 1992-11-10 |
| 5114816 | Radiation-sensitive compounds, radiation-sensitive mixture prepared therewith and copying material | Siegfried Scheler, Helmut Lenz, Klaus Bergmann, Herbert Siegel | 1992-05-19 |
| 5077395 | Substituted 1,2-naphthoquinone-2-diazide-4-sulfonic acids and processes for their preparation and use | Siegfried Scheler, Klaus Bergmann | 1991-12-31 |
| 5066567 | Image reversal process utilizing a positive-working photosensitive composition containing a dye | Hans-Joachim Merrem, Ruediger Lenz | 1991-11-19 |
| 5008362 | Binders soluble in aqueous alkali and containing silanyl groups in the side chain, process for preparing same and also photosensitive mixture containing these compounds | Peter Wilharm, Juergen Fuchs | 1991-04-16 |
| 4927732 | Positive-working photosensitive composition containing a dye and positive-working photosensitive recording material prepared therefrom | Hans-Joachim Merrem, Ruediger Lenz | 1990-05-22 |
| 4914721 | Safety device | Karl C. Glaeser, Joachim Cardinal, Klaus Genuit, Detlef Lohmuller, Heinz Tilmans | 1990-04-03 |
| 4814632 | Safety device | Karl C. Glaeser, Detlef Lohmuller, Heinz Tilmans, Klaus Genuit, Joachim Cardinal | 1989-03-21 |
| 4802312 | Wet sand blasting with pressurized water feed | Karl C. Glaeser | 1989-02-07 |
| 4774171 | Bis-1,2-naphthoquinone-2-diazide-sulfonic acid amides, their use in a radiation-sensitive mixture, and radiation-sensitive copying material | Wolfgang Zahn | 1988-09-27 |
| 4696888 | Light-sensitive compounds possessing trichloromethyl groups, a process for their production and light-sensitive mixtures containing these compounds | — | 1987-09-29 |
| 4619998 | Light-sensitive triazines possessing trichloromethyl groups | — | 1986-10-28 |
| 4506003 | Positive-working radiation-sensitive mixture | Hans Ruckert, Hartmut Steppan | 1985-03-19 |
| 4421844 | Process for the preparation of relief copies | Marie-Luise Geus | 1983-12-20 |
| 4409314 | Light-sensitive compounds, light-sensitive mixture, and light-sensitive copying material prepared therefrom | Hans Ruckert, Paul Stahlhofen | 1983-10-11 |
| 4339530 | Developer mixture for developing exposed light-sensistive copying layers | Gerhard Sprintschnik, Rudolf Neubauer | 1982-07-13 |
| 4311782 | Radiation-sensitive mixture and process for the production of relief images | Hans Ruckert | 1982-01-19 |
| 4266001 | Light-sensitive mixture | Hans Ruckert | 1981-05-05 |
| 4250247 | Acid degradable radiation-sensitive mixture | Jurgen Sander, Hans Ruckert | 1981-02-10 |
| 4248957 | Acid degradable radiation-sensitive mixture | Jurgen Sander, Detlef Skaletz, Gerhard Lohaus | 1981-02-03 |
| 4247611 | Positive-working radiation-sensitive copying composition and method of using to form relief images | Jurgen Sander, Hans Ruckert | 1981-01-27 |
| 4189323 | Radiation-sensitive copying composition | — | 1980-02-19 |