Issued Patents All Time
Showing 51–75 of 75 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4599293 | Toner transfer process for transferring and fixing a toner image by means of film | Albrecht Eckell, Albert Elzer, Reinhold J. Leyrer, Heinz-Ulrich Werther | 1986-07-08 |
| 4576898 | Process of making photopolymer relief plates using an adhesive layer | Dieter Kleuser, Werner Lenz | 1986-03-18 |
| 4559285 | Electrophotographic recording materials containing a metal acetylacetonate | — | 1985-12-17 |
| 4556621 | Electrophotographic recording material containing a metal-1,3-diketone complex | Peter Neumann | 1985-12-03 |
| 4556622 | Electrophotographic recording material whose photoconductor layer contains a halogenated perylene dye sensitizer | Peter Neumann, Karl-Heinz Etzbach | 1985-12-03 |
| 4547454 | Photosensitive multi-layer material and preparation of adhesive layers employed therein | Bernd Bronstert, Herbert Hahn, Mong-Jon Jun | 1985-10-15 |
| 4533612 | Electrophotographic recording materials containing special charge carrier-transporting compounds | Heinz Eilingsfeld, Karl-Heinz Etzbach, Peter Neumann | 1985-08-06 |
| 4517270 | Electrophotographic recording medium | Fritz Graser, Reinhold J. Leyrer, Peter Neumann, Manfred Patsch | 1985-05-14 |
| 4481272 | Layered electrophotographic recording medium comprising heterocyclic nitrogen containing organic dye compounds | Albrecht Eckell, Heinz Eilingsfeld, Albert Elzer, Franz Feichtmayr, Reinhold J. Leyrer +1 more | 1984-11-06 |
| 4465857 | Phenylhydrazones | Peter Neumann, Karl-Heinz Etzbach, Heinz Eilingsfeld | 1984-08-14 |
| 4464477 | Process for the recovery and reuse of heavy metal oxidation catalyst from residues in the Witten DMT process | Heinrich Bunger, Rudolf Cordes | 1984-08-07 |
| 4456672 | Electrophotographic recording materials containing triazole charge carrier-transporting compounds | Heinz Eilingsfeld, Karl-Heinz Etzbach, Peter Neumann | 1984-06-26 |
| 4429029 | Organic electrophotographic recording medium | Fritz Graser, Reinhold J. Leyrer | 1984-01-31 |
| 4419427 | Electrophotographic medium with perylene-3,4,9,10-tetracarboxylic acid N,N'-bis-(2',6'-dichlorophenyl)-diimide | Fritz Graser, Reinhold J. Leyrer, Peter Neumann | 1983-12-06 |
| 4401749 | Multi-layer elements suitable for the production of printing plates and relief plates, and their production | Peter Richter | 1983-08-30 |
| 4396695 | Electrophotographic medium with heterocyclic azo photoconductor | Manfred Dimmler, Dieter Buhl | 1983-08-02 |
| 4394243 | Electrode for an electrochemical metal machine process | — | 1983-07-19 |
| 4389475 | Multilayered electrophotographic recording medium | Peter Neumann | 1983-06-21 |
| 4387157 | Photosensitive multi-layer material and preparation of adhesive layers employed therein | Bernd Bronstert, Herbert Hahn, Werner Lenz | 1983-06-07 |
| 4385109 | Method of making a relief plate using a photopolymerizable recording composition | Peter Lechtken, Bernd Bronstert, Rudolf Vyvial, John Lynch | 1983-05-24 |
| 4357414 | Laminate useful for the production of printing plates and relief plates | Heinrich Hartmann, Werner Lenz | 1982-11-02 |
| 4355093 | Laminate useful for the production of printing plates and relief plates | Heinrich Hartmann, Werner Lenz, John Lynch, Herbert Naarmann | 1982-10-19 |
| 4291501 | Device for counterbalancing a swivelable body part on a motor vehicle | Klaus Steinberg | 1981-09-29 |
| 4292152 | Photopolymerizable recording composition containing acylphosphine oxide photoinitiator | Peter Lechtken, Bernd Bronstert, Rudolf Vyvial, John Lynch | 1981-09-29 |
| 4189322 | Photopolymerizable compositions for the production of printing plates and relief plates containing dianthronyl or bisanthrone compound | Dieter Kleuser, Bernd Bronstert | 1980-02-19 |