Photochromatic pyrano-1,3-oxazinonaphthalene derivatives

Details Photochromatic pyrano-1,3-oxazinonaphthalene derivatives Photochromatic pyrano-1,3-oxazinonaphthalene derivatives

2007-08-28

2007-08-28

Anthony, Joseph D. (Department: 1714)

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

C544S088000, C544S096000, C544S071000, C544S073000, C252S586000, C252S588000, C524S089000, C524S090000, C524S096000

Reexamination Certificate

active

10257408

ABSTRACT:
Photochromatic compounds belonging to the groups of chromenes and spiro-pyrans having general formula (I)

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