Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7566349 | Amphoteric fluorescent whitening agents | Goetz Scheffler, Peter Rohringer | 2009-07-28 |
| 7247174 | Amphoteric fluorescent whitening agents | Goetz Scheffler, Peter Rohringer | 2007-07-24 |
| 6919454 | Biphenyl-substituted triazines | Jurgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz | 2005-07-19 |
| 6841670 | Biphenyl-substituted triazines | Jurgen Kaschig, Georges Metzger, Dieter Reinehr | 2005-01-11 |
| 6468958 | Biphenyl-substituted triazines | Jurgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz | 2002-10-22 |
| 6255483 | Biphenyl-substituted triazines | Jurgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz | 2001-07-03 |
| 5952524 | Process | Victor Paul Eliu, Werner Kanert, Adriano Indolese, Julia Volkel, Anita Schnyder | 1999-09-14 |
| 5426192 | Chromogenic lactam compounds, their preparation and their use | Hans-Peter Baumann | 1995-06-20 |
| 5329006 | Chromogenic lactam compounds, their preparation and their use | Hans-Peter Baumann | 1994-07-12 |
| 5162550 | Bisphthalide lactones, their preparation and the use thereof in recording materials | Rudolf Zink | 1992-11-10 |
| 4933448 | Chromogenic lactone compounds of benzopyrano-2H-pyrazoles | — | 1990-06-12 |
| 4766211 | Chromogenic quinazolines | Rudolf Zink | 1988-08-23 |
| 4705776 | Recording material containing chromogenic 3,3-bisindolyl-4-azaphthalides | Davor Bedekovic | 1987-11-10 |
| 4705775 | Recording material employing chromogenic bisquinazolines | Rudolf Zink | 1987-11-10 |
| 4695636 | Chromogenic dihydrofuropyridinones | Davor Bedekovic | 1987-09-22 |
| 4675407 | Ring-substituted 4-azaphthalides | Davor Bedekovic | 1987-06-23 |
| 4668790 | Chromogenic dihydrofuropyridinones | Davor Bedekovic | 1987-05-26 |
| 4668966 | Aliphatic bridged chromogenic bisquinazolines substituted with phenylamine or phenyl-containing heterobicyclic radicals | Rudolf Zink | 1987-05-26 |
| 4625027 | Bisquinazolines useful in color former systems | Rudolf Zink | 1986-11-25 |
| 4587539 | Chromogenic dihydrofuropyridinones | Davor Bedekovic | 1986-05-06 |
| 4587343 | Chromogenic 3,3-bisindolyl-4-azaphthalides | Davor Bedekovic | 1986-05-06 |
| 4562449 | Chromogenic dihydroquinazolines | Heinz Balli, Sigmund Gunzenhauser, Davor Bedekovic | 1985-12-31 |
| 4555569 | Chromogenic quinazolines | Rudolf Zink | 1985-11-26 |
| 4508897 | Preparation of chromogenic azaphthalides | Davor Bedekovic | 1985-04-02 |
| 4506073 | Chromenoazaindolizine compounds | Heinz Balli, Sigmund Gunzenhauser, Davor Bedekovic | 1985-03-19 |