Polycarbonate articles with photochromic properties
US6114437A · kind A · utility
22Cited by
27References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Feb 4, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2369/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Polychromic articles are manufactured by solvent casting polycarbonate resins previously mixed with a photochromic dye and evaporating the solvent. The films produced can be insert injection molded with polycarbonate substrates to obtain photochromic articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.