Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5563018 | (1,2-naphthoquinone 2-diazide) sulfonic acid esters, radiation-sensitive mixture prepared therewith and radiation-sensitive recording material | Gerhard Buhr, Wolfgang Zahn, Siegfried Scheler | 1996-10-08 |
| 5358823 | Radiation-sensitive composition containing esterification product of (1,2-naphthoquinone-2-diazide)-sulfonic acid with 2,3,4,4'-tetrahydroxybenzophenone and a di- or tri-hydroxybenzophenone | Wolfgang Zahn, Hans-Joachim Merrem, Axel Schmitt | 1994-10-25 |
| 5216158 | Oxadiazole compounds containing 4,6-bis-trichloromethyl-S-triazin-2-yl groups, process for their preparation | Georg Pawlowski, Heidrun Lutz | 1993-06-01 |
| 5064959 | Aromatic compounds substituted by 4,6-bis(trichloromethyl)-s-triazin-2-yl groups | Georg Pawlowski, Heidrun Lutz | 1991-11-12 |
| 4873169 | Process for the preparation of an o-naphthoquinonediazide sulfonic acid ester and photosensitive mixture containing same | Horst-Dieter Thamm, Hans J. Staudt | 1989-10-10 |
| 4555469 | Process of preparing light-sensitive naphthoquinonediazidesulfonic acid ester | Ulrich Simon | 1985-11-26 |
| 4492748 | Light-sensitive polycondensation product containing diazonium and dialdehyde groups, and light-sensitive recording material prepared therewith | Walter Lutz, Hartmut Steppan | 1985-01-08 |
| 4424270 | Light-sensitive mixture comprising a naphthoquinonediazidesulfonic acid ester and process for preparing said ester | Ulrich Simon | 1984-01-03 |
| 4266000 | Photosensitive copying composition | Paul Stahlhofen | 1981-05-05 |