Water soluble benzoxanthene dyestuffs for fluorescent inks
US4242139A · kind A · utility
5Cited by
4References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1979 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Feb 1, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-soluble dyestuffs of the formula ##STR1## in which Y is oxygen or an imino group, R.sup.1 and R.sup.2 are hydrogen, halogen or lower alkyl or lower alkoxy, n is 1 to 3 and Z is a cation, are useful for fluorescent inks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.