Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8088830 | Paper production with modified silica gels as microparticles | Bernd Thiele, Gerd-Friedrich Renner, Johan Kijlstra, Arno Nennemann, Thomas Hübbe +1 more | 2012-01-03 |
| 7708862 | Paper production with modified silica gels as microparticles | Bernd Thiele, Gerd-Friedrich Renner, Johan Kijlstra, Arno Nennemann, Thomas Hübbe +1 more | 2010-05-04 |
| 6989106 | Process for the preparation of polymeric condensates and their use | Lars Obendorf, Branislav Boehmer, Bernd Thiele, Armin Spaniol, Dietmar Fuchs +2 more | 2006-01-24 |
| 6576687 | Wet-strength agent with low DCP content | Karl-Rudolf Gassen, Joachim Konig, Fritz Puchner, Jurgen Reiners, Horst Zwick | 2003-06-10 |
| 5840902 | Process for the preparation of beta-hydroxyalkypicolinium salts | Klaus Walz, Gerd-Friedrich Renner, Hans Schulze, Carsten Gerdes, Karl-Rudolf Gassen +2 more | 1998-11-24 |
| 5725607 | Method for reducing the toxicity of spent liquors and novel cationic dyes | Henry Giera, Felix Reichel, Horst Berneth, Thomas Böcker, Karin Hassenruck +1 more | 1998-03-10 |
| 5179211 | Process for the preparation of indoles | Heinz U. Blank, Friedrich-Wilhelm Ullrich, Willi Streicher, Nikolaus Schulz, Dieter Irmscher +1 more | 1993-01-12 |
| 5130442 | Chromogenic enamine compounds, their preparation and use as color formers | Hubertus Psaar | 1992-07-14 |
| 4968797 | Chromogenic 4,4-diaryldihydroquinazolones | Horst Berneth, Alfred Brack | 1990-11-06 |
| 4754034 | Chromogenic 4,4-diaryldihydroquinazolones | Horst Berneth, Alfred Brack | 1988-06-28 |
| 4727140 | Chromogenic 4,4-diaryl-2-oxobenzo-3,1-oxazines | Horst Berneth | 1988-02-23 |
| 4600776 | Cationic enamine dyestuff indolylmethine derivatives | Roderich Raue | 1986-07-15 |