Issued Patents 2005
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6967249 | Photochromic 3H-naphtho[2,1-b]-pyran compounds and photochromic articles produced therewith | Claudia Mann, Udo Weigand | 2005-11-22 |
| 6936725 | Photochromic compounds | Herbert Zinner | 2005-08-30 |
| 6933325 | High index curable photochromic composition and its process | Qiang Zheng, Donald S. Nelson, Jr., Charles William Carper, Jr., Herbert Schuster, Herbert Zinner | 2005-08-23 |
| 6881850 | Heterocyclically annellated indenochromene derivatives | Claudia Mann, Udo Weigand | 2005-04-19 |
| 6853471 | Photochromic synthetic resin object with permanently increased contrast | Hans-Peter Sommer, Michael Voegt, Gerd-Peter Scherg | 2005-02-08 |