Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6242598 | Methods for the preparation of tris-aryl-o-hydroxyphenyl-s-triazines | Michael Ackerman, Pascal Hayoz, Roger Meuwly, John Francis Oswald, Christian Schregenberger | 2001-06-05 |
| 5942626 | Process for making 5-thio-substituted benzotriazole UV absorbers | Roland A. E. Winter, Volker H. von Ahn, Mark S. Holt, Ramanathan Ravichandran | 1999-08-24 |
| 5849821 | Tris-aryl-s-triazines substituted with biphenylyl groups | Revathi Iyengar, Ramanathan Ravichandran | 1998-12-15 |
| 5726309 | Tris-aryls-triazines substituted with biphenylyl groups | Revathi Iyengar, Ramanathan Ravichandran | 1998-03-10 |
| 5684070 | Compositions stabilized with red-shifted tris-aryl-s-triazines | — | 1997-11-04 |
| 5681955 | Red-shifted tris-aryl-s-triazines | — | 1997-10-28 |
| 5675004 | Red-shifted tris-aryl-S-triazines | — | 1997-10-07 |
| 5648488 | Compositions stabilized with red-shifted tris-aryl-s-triazines | — | 1997-07-15 |
| 5637706 | Compositions stabilized with red-shifted tris-aryl-s-triazines | Ramanathan Ravichandran, Mark S. Holt, Thuy N. Phan, Jean-Luc Birbaum, Vien Van Toan | 1997-06-10 |
| 5585422 | Hybrid s-triazine light stabilizers substituted by benzotriazole or benzophenone moieties and compositions stabilized therewith | Robert A. Falk, Gregory R. Coughlin | 1996-12-17 |
| 5556973 | Red-shifted tris-aryl-s-triazines and compositions stabilized therewith | Ramanathan Ravichandran, Mark S. Holt, Thuy N. Phan, Jean-Luc Birbaum, Vien Van Toan | 1996-09-17 |
| 5543518 | Red-shifted tris-aryl-s-triazines and compositions stabilized therewith | Ramanathan Ravichandran, Mark S. Holt, Thuy N. Phan, Jean-Luc Birbaum, Vien Van Toan | 1996-08-06 |
| 5516914 | Compositions stabilized with 5-thio-substituted benzotriazole UV-absorbers | Roland A. E. Winter, Volker H. von Ahn, Mark S. Holt, Ramanathan Ravichandran | 1996-05-14 |
| 5476937 | S-triazine UV absorbers substituted by a sulfur-containing moiety | Mark S. Holt, Ramanathan Ravichandran | 1995-12-19 |
| 5436349 | Compositions stabilized with 5-sulfonyl-substituted benotriazole UV-absorbers | Roland A. E. Winter, Volker H. von Ahn, Mark S. Holt, Ramanathan Ravichandran | 1995-07-25 |
| 5354794 | Electro coat/base coat/clear coat finishes stabilized with S-triazine UV absorbers | Mark S. Holt, Ramanathan Ravichandran | 1994-10-11 |
| 5280124 | 5-sulfonyl-substituted benzotriazole UV-absorbers | Roland A. E. Winter, Volker H. von Ahn, Mark S. Holt, Ramanathan Ravichandran | 1994-01-18 |
| 5278314 | 5-thio-substituted benzotriazole UV-absorbers | Roland A. E. Winter, Volker H. von Ahn, Mark S. Holt, Ramanathan Ravichandran | 1994-01-11 |