Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5756691 | Water--insoluble azo colorants based on N-acetoacetyldehydrothiotoluidine | Joachim Weber | 1998-05-26 |
| 5591257 | Pigment preparations based on monoazo pigments | Joachim Weide, R udiger Jung | 1997-01-07 |
| 5559216 | Single-step process for the preparation of bis-(acetoacetylamino) benzene disazo pigments | Ruediger Jung, Joachim Weide | 1996-09-24 |
| 5464941 | Biphenyl pyrazine compounds | Richard Vicari, George Kvakovszky, Olan S. Fruchey | 1995-11-07 |
| 5428136 | Water-insoluble azo colorants having two azo groups and a 1,4-bis (acetoacetylamino) benzene coupling component | Rudiger Jung, Joachim Weide | 1995-06-27 |
| 5382288 | Azo pigment preparation | Karl H. Schenk, Angelika Heinrichs | 1995-01-17 |
| 5352281 | Use of azo pigment preparations for solvent-containing packaging intaglio and flexographic printing inks | Joachim Weide, Ruediger Jung, Rainer Winter | 1994-10-04 |
| 5266682 | Nitrogen-containing surface-active agents | Heinz Uhrig, Siegfried Schwerin, Dieter Schnaitmann | 1993-11-30 |
| 5227531 | Process for the preparation of fluorobenzaldehydes | Klaus Warning | 1993-07-13 |
| 5041571 | Process of producing anthraquinones in one step | Mohammad Aslam | 1991-08-20 |
| 4937395 | Process for the preparation of fluorobenzenes | Heinz Litterer, Theodor Papenfuhs, Frank P. Sistig, Ernst I. Leupold | 1990-06-26 |
| 4855517 | Process for preparing aromatic bromine compounds | Klaus Warning | 1989-08-08 |
| 4715995 | Process for the preparation of alkali metal and alkaline earth salts of benzaldehyde-2,4-disulfonic acid | — | 1987-12-29 |
| 4710322 | Process for the preparation of alkali metal and alkaline earth salts of benzaldehyde-2,4-di-sulfonic acid | — | 1987-12-01 |