Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5108860 | Electrophotographic recording material and method for the manufacture thereof | Siegfried Birkle, Johann Kammermaier | 1992-04-28 |
| 4619500 | Method for producing orientation layers for liquid crystal displays and liquid crystal displays having orientation layers | Hellmut Ahne, Hans Kruger | 1986-10-28 |
| 4590103 | Method for the preparation of thin polyimide film | Hellmut Ahne, Wolfgang Kleeberg, Hans Kruger | 1986-05-20 |
| 4514043 | Method for the preparation of orientation layers for liquid crystal displays and liquid crystal displays having orientation layers | Hellmut Ahne, Hans Kruger | 1985-04-30 |
| 4469408 | Liquid-crystal display having orienting polymer with flexible bridges | Hans Kruger | 1984-09-04 |
| 4446266 | N,N'-Bis-salicyloyl-hydrazine as a metal deactivator | Wolfgang von Gentzkow | 1984-05-01 |
| 4405707 | Method of producing relief structures for integrated semiconductor circuits | Hartwig Bierhenke, Siegfried Birkle | 1983-09-20 |
| 4398009 | Polyoxazole precursor and the preparation thereof | Hellmut Ahne, Eberhard Kuhn | 1983-08-09 |
| 4397999 | Polyimidazole and polyimidazopyrrolone precursor stages and the preparation thereof | Hellmut Ahne, Eberhard Kuhn | 1983-08-09 |
| 4395481 | Method for the manufacture of resist structures | Siegfried Birkle, Hans Hauschildt, Eva Rissel | 1983-07-26 |
| 4395482 | Method for the preparation of heat-resistant relief structures using positive resists | Hellmut Ahne, Eberhard Kuhn | 1983-07-26 |
| 4385165 | Polyimide, polyisoindoloquinazoline dione, polyoxazine dione and polyquinazoline dione precursor stages and the manufacture | Hellmut Ahne, Eberhard Kuhn | 1983-05-24 |
| 4371685 | Radiation-reactive precursor stages of highly heat-resistant polymers | Hellmut Ahne, Eberhard Kuhn | 1983-02-01 |
| 4366230 | Method for the preparation of highly heat-resistant relief structures and the use thereof | Hellmut Ahne, Eberhard Kuhn | 1982-12-28 |
| 4339521 | Heat resistant positive resists containing polyoxazoles | Hellmut Ahne, Eberhard Kuhn | 1982-07-13 |
| 4332882 | Method for the preparation of highly heat-resistant relief | Hellmut Ahne, Eberhard Kuhn | 1982-06-01 |
| 4332883 | Method for the manufacture of highly heat-resistant relief structures | Hellmut Ahne, Eberhard Kuhn, Erwin Schmidt | 1982-06-01 |
| 4329556 | N-Azidosulfonylaryl-maleinimides | Eberhard Kuhn, Hellmut Ahne | 1982-05-11 |
| 4311785 | Method for the preparation of highly heat-resistant relief structures and the use thereof | Hellmut Ahne, Eberhard Kuhn, Erwin Schmidt | 1982-01-19 |
| 4302233 | Method for the manufacture of a high-tensile-strength light wave-guide | Hellmut Ahne, Hubert Aulich, Friedrich Weidinger | 1981-11-24 |
| 4292398 | Method for the preparation of relief structures by phototechniques | Eberhard Kuhn, Hellmut Ahne | 1981-09-29 |
| 4287294 | Method for the preparation of relief structures by phototechniques | Eberhard Kuhn, Hellmut Ahne | 1981-09-01 |
| 4283505 | Method for cross-linking and stabilizing polymers which can be cross-linked radically | Wolfgang Kleeberg, Wolfgang Rogler, Wolfgang V. Gentzkow | 1981-08-11 |
| RE30186 | Method for the preparation of relief structures | Wolfgang Kleeberg, Eberhard Kuhn | 1980-01-08 |