Printing process
US5972544A · kind A · utility
10Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1996 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Dec 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/223
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing an optical filter comprising a colored cross-linked polymeric coating an a transparent substrate, which comprises applying to the substrate, by a printing process, a mixture comprising one or more polymer precursor(s), and one or more dye(s) having one or more heterocyclic NH group(s) or one or more substituent(s) capable of forming a covalent bond with the polymeric precursor, and thereafter using the mixture. The invention also provides formulations comprising one or more polymer precursors and dyes, optical filters, and a novel dye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.