Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7557208 | Naphthols useful for preparing indeno-fused photochromic naphthopyrans | Robert W. Walters, Anil Kumar, Clara E. Nelson | 2009-07-07 |
| 7527754 | Photochromic indeno-fused naphthopyrans | — | 2009-05-05 |
| 7517982 | Naphthols useful for preparing indeno-fused photochromic naphthopyrans | Robert W. Walters, Anil Kumar, Clara E. Nelson | 2009-04-14 |
| 7465415 | Photochromic materials derived from ring-opening monomers and photochromic initiators | Feng Wang, Barry Van Gemert, Kevin J. Stewart, Carol L. Knox, Patrick M. Brown | 2008-12-16 |
| 7262295 | Indeno-fused photochromic naphthopyrans, naphthols and photochromic articles | Robert W. Walters, Anil Kumar, Clara E. Nelson | 2007-08-28 |
| 7166357 | Photochromic articles that activate behind ultraviolet radiation blocking transparencies and methods for preparation | Anil Kumar, Michael S. Misura, Robert W. Walters, Barry Van Gemert, Clara E. Nelson | 2007-01-23 |
| 6348604 | Photochromic naphthopyrans | Clara M. Nelson, David B. Knowles, Barry Van Gemert, Anil Kumar | 2002-02-19 |
| 6296785 | Indeno-fused photochromic naphthopyrans | Clara M. Nelson, Olga G. Petrovskaia, David B. Knowles, Barry Van Gemert, Anil Kumar | 2001-10-02 |
| 6113814 | Polymerizable polyalkoxylated naphthopyrans | Barry Van Gemert, Anil Kumar | 2000-09-05 |