Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7166357 | Photochromic articles that activate behind ultraviolet radiation blocking transparencies and methods for preparation | Anil Kumar, Robert W. Walters, Barry Van Gemert, Anu Chopra, Clara E. Nelson | 2007-01-23 |
| 7147889 | Organic photochromic compositions of improved kinetic performance | Anil Kumar | 2006-12-12 |
| 6713536 | Removable imbibition composition of photochromic compound and epoxy and polyol kinetic enhancing additives | Anil Kumar | 2004-03-30 |
| 6433043 | Removable imbibition composition of photochromic compound and kinetic enhancing additive | Anil Kumar | 2002-08-13 |
| 6025026 | Process for producing an adherent polymeric layer on polymeric substrates and articles produced thereby | Robert A. Smith, Robert W. Walters, Kevin J. Stewart | 2000-02-15 |
| 5770115 | Photochromic naphthopyran compositions of improved fatigue resistance | — | 1998-06-23 |
| 5391327 | Photochromic compositions of improved fatigue resistance | John S. Ligas, Cletus N. Welch | 1995-02-21 |
| 4959429 | Cyclohexenic additives for producing polycarbonate polymers of high refractive index and low yellowness | Edward J. Sare | 1990-09-25 |
| 4666976 | Internally colored polyol (allyl carbonate) polymerizates | — | 1987-05-19 |
| 4622376 | Composition of aromatic poly(allylcarbonate), styrene materials, and crosslinker containing three or more ethylenically unsaturated groups for producing polymer of high refractive index and low yellowness | Richard A. Schwarz, Stephanie J. Oates | 1986-11-11 |
| 4548984 | Internally colored polyol (allyl carbonate) polymerizates comprising inorganic molybdenum compounds | — | 1985-10-22 |
| 4398008 | Thick polyol (allyl carbonate) polymerizates and method of preparing same | — | 1983-08-09 |