Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10281628 | Method of preparing a photochromic optical article using an organic solvent pretreatment and photochromic coating | Jerry L. Koenig, II, Joseph D. Turpen, Nancyanne Gruchacz | 2019-05-07 |
| 9690021 | Photochromic optical article having allophanate protective coating and process for making same | Joseph D. Turpen, Cynthia Kutchko, Vitawat Lahsangah, Jerry L. Koenig, II | 2017-06-27 |