Issued Patents All Time
Showing 76–100 of 109 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6340745 | Phthalocyanine and use of phthalocyanine as a marking agent | Frank Meyer, Christos Vamvakaris, Karin H. Beck, Bernhard Albert | 2002-01-22 |
| 6312958 | Method for marking liquids with at least two marker substances and method for detecting them | Frank Meyer, Karin H. Beck, Christos Vamvakaris | 2001-11-06 |
| 6130320 | Acid disazo dyes as well as sulphonamides as their intermediate product | Gunther Lamm, Helmut Reichelt | 2000-10-10 |
| 5998211 | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Bernhard Albert, Juergen Kipper, Christos Vamvakaris, Karin H. Beck | 1999-12-07 |
| 5886242 | Polymerizable, chiral compounds and their use | Karl-Heinz Etzbach, Paul Delavier, Karl Siemensmeyer, Lothar Laupichler, Volkmar Vill | 1999-03-23 |
| 5804097 | Liquid-crystalline compounds | Paul Delavier, Karl-Heinz Etzbach, Andreas Schmidt, Karl Siemensmeyer | 1998-09-08 |
| 5804447 | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Bernhard Albert, Juergen Kipper, Christos Vamvakaris, Karin H. Beck | 1998-09-08 |
| 5780629 | Polymerizable, chiral compounds and their use | Karl-Heinz Etzbach, Paul Delavier, Karl Siemensmeyer, Lothar Laupichler, Volkmar Vill | 1998-07-14 |
| 5763612 | Benzopyran dyes and their intermediates | Helmut Reichelt, Clemens Grund | 1998-06-09 |
| 5620756 | Production of a ferroelectric or antiferroelectric or ferrielectric order in liquid crystals which solidify in a glass-like manner | Volker Bach, Karl-Heinz Etzbach, Karl Siemensmeyer | 1997-04-15 |
| 5573585 | Molecular sieves containing azo dyes | Guenter Lauth, Wolfgang Hoelderich, Bernhard Albert, Gunther Lamm, Helmut Reichelt +2 more | 1996-11-12 |
| 5554318 | Use of compounds which absorbs and fluoresce in the IR range as crack-detecting agents | Peter Neumann, J urgen Kipper, Bernhard Albert | 1996-09-10 |
| 5538824 | Reversible or irreversible production of an image | Volker Bach, Karl-Heinz Etzbach, Harald Fuchs, Karl Siemensmeyer | 1996-07-23 |
| 5420259 | Tryptanthrine derivatives | Andreas Guentner, Guenther Seybold | 1995-05-30 |
| 5417882 | Liquid-crystalline compounds | Volker Bach, Karl-Heinz Etzbach, Karl Siemensmeyer | 1995-05-23 |
| 5360474 | Colored crystalline aluminophosphates and/or silicoaluminophosphates of the AEL or VFI type | Guenter Lauth, Ulrich Mueller, Wolfgang Hoelderich, Stefan Brode | 1994-11-01 |
| 5312703 | Reversible or irreversible production of an image | Volker Bach | 1994-05-17 |
| 5214146 | Derivatives of quinolinecarboxylic acids | Ulrike Schloesser | 1993-05-25 |
| 5212027 | Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on | Karl-Heinz Etzbach, Wolfgang Brox, Axel Paul, Volker Bach | 1993-05-18 |
| 5187248 | Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on | Karl-Heinz Etzbach, Wolfgang Brox, Axel Paul, Volker Bach | 1993-02-16 |
| 5187298 | Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on | Kark-Heinz Etzbach, Wolfgang Brox, Axel Paul, Volker Bach | 1993-02-16 |
| 5162545 | Malonic acid dyes and polycondensation products thereof | Karl-Heinz Etzbach, Karin H. Beck | 1992-11-10 |
| 5112362 | Navy dye mixtures of azo disperse dyes for polyester | Erwin Hahn, Guenter Hansen, Gunther Lamm, Helmut Reichelt | 1992-05-12 |
| 5110829 | 2,2'-thienylbenzothiophenes, their preparation and their use for controlling pests | Reiner Kober, Hans Theobald, Uwe Kardorff, Christoph Kuenast, Peter Hofmeister +1 more | 1992-05-05 |
| 5097463 | Laser-optical writing and reading process using a thermally alterable reading layer containing liquid-crystalline compound | Karl-Heinz Etzbach, Bernd Hisgen | 1992-03-17 |