Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7767807 | Use of phthalocyanines as marking substances for liquids | Sophia Ebert, Thomas Gessner, Ruediger Sens | 2010-08-03 |
| 6616712 | Use of compositions containing bisazo compounds for detecting fissures | Karin H. Beck, Karl-Heinz Etzbach, Gerhard Scholz, Claudia Krah | 2003-09-09 |
| 6340745 | Phthalocyanine and use of phthalocyanine as a marking agent | Frank Meyer, Karin H. Beck, Gerhard Wagenblast, Bernhard Albert | 2002-01-22 |
| 6312958 | Method for marking liquids with at least two marker substances and method for detecting them | Frank Meyer, Gerhard Wagenblast, Karin H. Beck | 2001-11-06 |
| 5998211 | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Bernhard Albert, Juergen Kipper, Karin H. Beck, Gerhard Wagenblast | 1999-12-07 |
| 5804447 | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Bernhard Albert, Juergen Kipper, Karin H. Beck, Gerhard Wagenblast | 1998-09-08 |
| 5697984 | Dye preparations with ethylene oxide-castor oil reaction products | Dieter Swatzina, Karin H. Beck, Juliane Krusemann | 1997-12-16 |
| 5663386 | Method for marking mineral oils with amthraquinones | Friedrich-Wilhelm Raulfs | 1997-09-02 |
| 5266227 | Oil-soluble phenylazoaniline dyes | Helmut Reichelt, Georg Zeidler | 1993-11-30 |
| 5182372 | Aniline-based oil-soluble azo dyes | Bernd Derber, Guenter Hansen, Helmut Reichelt, Georg Zeidler | 1993-01-26 |
| 5171328 | Stabilizer-containing wood stains | Hubert Trauth | 1992-12-15 |
| 5145573 | Marked mineral oils and method of marking mineral oils with basic dyes | Guenther Riedel | 1992-09-08 |
| 4911888 | Use of salts of sulfonamidocarboxylic acids as corrosion inhibitors in aqueous systems | Rolf Fikentscher, Gerold Braun, Chung-Ji Ischang, Reinhold Kohlhaupt | 1990-03-27 |
| 4873299 | Batchwise preparation of crosslinked, finely divided polymers | Bernhard H. Nowakowsky, Juergen Beck, Heinrich Hartmann | 1989-10-10 |
| 4855423 | Preparation of sulfatobetaines | Gerold Braun, Chung-Ji Tschang, Klaus Glaser | 1989-08-08 |
| 4837330 | Preparation of sulfatobetaines | Gerold Braun, Chung-Ji Tschang, Klaus Glaser | 1989-06-06 |
| 4769427 | Continuous preparation of finely divided gel-like crosslinked polymers | Bernhard H. Nowakowsky, Juergen Beck, Heinrich Hartmann | 1988-09-06 |
| 4753885 | Foam control in the sugar industry and in the yeast industry | Wolfram Dietsche, Klaus Lorenz, Albert Hettche | 1988-06-28 |
| 4739009 | Preparation of bead polymers based on water-soluble ethylenically unsaturated monomers by reverse suspension polymerization | Wilfried Heide, Heinrich Hartmann | 1988-04-19 |
| 4693909 | Aqueous wax dispersions as preservatives for metal surfaces and surfaces of coatings, their use and a process for preserving metal surfaces and surfaces of coatings | Walter Ziegler, Wolfram Dietsche, Stefan Weiss, Richard W. Mueller, Albert Hettche +1 more | 1987-09-15 |
| 4667020 | Aromatic disazo dyes and liquid-crystalline materials containing these dyes | Karl-Heinz Etzbach | 1987-05-19 |
| 4647396 | Copolymers for detergents and cleaning agents | Walter Denzinger, Heinrich Hartmann, Albert Hettche, Ulrich Kaluza, Johannes Perner | 1987-03-03 |
| 4496439 | Acidic zinc-plating bath | Norbert Greif, Knut Oppenlaender, Albert Hettche | 1985-01-29 |
| 4404389 | Thiazole containing coumarin compounds | Manfred Patsch, Wolfgang Mach | 1983-09-13 |
| 4271303 | Heterocyclic compounds | Peter Neumann, Manfred Patsch | 1981-06-02 |