Fluorescent agent having ethynyl group
US8168796B2 · kind B2 · utility
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Key dates
| Filing date | Jan 19, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Jan 19, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D405/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are provided novel fluorescent agents, such as pyrazoline compounds represented by formula (I):(wherein R1, R2 and R3 are as defined in the specification),having an ethynyl group in the molecule,which have high absorptivity in the ultraviolet-visible short wavelength range (for example, 350 nm-420 nm).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.