Issued Patents All Time
Showing 51–75 of 154 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5008397 | N-substituted benzimidazole-2-carboxanilides | Peter Spang, Gerhard Wagenblast, Hubert Trauth | 1991-04-16 |
| 5008312 | 2,6-polyalkylpiperidine-substituted bislactams and their use for the stabilization of organic material, in particular of plastics, and materials stabilized therewith | Alexander Aumueller, Hubert Trauth | 1991-04-16 |
| 5002863 | Naphtholactamtrimethine dyes and optical recording medium containing same | Matthias Dust, Michael Acker, Heidi Benthack-Thoms, Klaus D. Schomann, Harald Kuppelmaier | 1991-03-26 |
| 4996354 | Preparation of 2,4-dihydroxybenzoic acid | Ulrich Eichenauer | 1991-02-26 |
| 4990680 | Process for the preparation of 2,4-dihydroxybenzophenone | Alexander Aumueller | 1991-02-05 |
| 4990660 | Preparation of aromatic hydroxycarboxylic acids | Ulrich Eichenauer | 1991-02-05 |
| 4990649 | Azulenesquaric acid dyes that contain urethane groups | Wolfgang Schrott, Michael Schmitt, Sibylle Brosius, Klaus D. Schomann, Harald Kuppelhamier | 1991-02-05 |
| 4987220 | Purification of poly(n-vinylcarbazole) containing impurities | Reinhard Aldag | 1991-01-22 |
| 4985566 | Benzimidazole-2-carboxanilides | Peter Spang, Hubert Trauth | 1991-01-15 |
| 4983773 | Preparation of bis-(4-chlorophenyl) sulfone | Michael Stumpp, Heinz Eilingsfeld | 1991-01-08 |
| 4982005 | Preparation of benzophenones | Ulrich Eichenauer | 1991-01-01 |
| 4981975 | Benzimidazole-2-carboxanilides | Peter Spang, Hubert Trauth | 1991-01-01 |
| 4981969 | Polyalkylpiperidine-substituted tetrahydropyridones and use thereof | Alexander Aumueller, Hubert Trauth | 1991-01-01 |
| 4980476 | Polyalkylpiperidine-substituted lactams and use thereof as stabilizers for plastics | Alexander Aumueller, Hubert Trauth | 1990-12-25 |
| 4980512 | Preparation of 2-hydroxy-4-alkoxybenzophenones | Alexander Aumueller | 1990-12-25 |
| 4980081 | Polymers which form liquid-crystalline phases | Helmut Ringsdorf, Willi Kreuder, Karl-Heinz Etzbach, Hans-Josef Sterzel | 1990-12-25 |
| 4976889 | 4-formylaminopiperidine derivatives, their use as stabilizers and organic material stabilized with the said derivatives | Alexander Aumueller, Hubert Trauth | 1990-12-11 |
| 4962011 | Photopolymerizable recording materials containing a triazole sensitizer and photoresist layers and lithographic printing plates based thereon | Reinhard Aldag, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz | 1990-10-09 |
| 4958022 | Polycyclic compounds | Alexander Aumueller, Hubert Trauth | 1990-09-18 |
| 4948702 | Photosensitive recording element | Guenter Wallbillich, Guenter Hansen | 1990-08-14 |
| 4943391 | Bicyclo(3.3.1)nonane derivatives and use in stabilizing organic materials | Alexander Aumueller, Hubert Trauth | 1990-07-24 |
| 4940742 | 2,6-polyalkylpiperidine-substituted benzimidazole-2-carboxanilides and their use for stabilizing organic material | Alexander Aumueller, Peter Spang, Hubert Trauth | 1990-07-10 |
| 4940649 | Photopolymerizable recording materials and photoresist layers and lithographic printing plates based thereon | Reinhard Aldag, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz, Friedrich-Wilhelm Raulfs | 1990-07-10 |
| 4939012 | Naphtholactam dyes and optical recording medium containing these dyes | Matthias Dust, Ernst Schefczik, Heidi Benthack-Thoms, Helmut Barzynski, Klaus D. Schomann +2 more | 1990-07-03 |
| 4937338 | Pigments | Helmut Flohr, Joachim Jesse, Bernhard Albert | 1990-06-26 |