Novel benzopyrano[6,7,8-i,j]quinolizine-11-one lasing dyes
US4794184A · kind A · utility
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5References
3Claims
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Key dates
| Filing date | Aug 31, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D491/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel benzopyrano[6,7,8-i,j]quinolizine-11-one lasing dyes and intermediates for their preparation are disclosed. 2
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.