Photochromic article
US11168223B2 · kind B2 · utility
1Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Feb 2, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are articles having a thermoplastic photochromic coating. The articles exhibit a Bayer Abrasion ratio of at least 2 and desirable photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.