Heterocyclically annellated indenochromene derivatives

Details Heterocyclically annellated indenochromene derivatives Heterocyclically annellated indenochromene derivatives

2005-04-19

2005-04-19

Trinh, Ba K. (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S041000, C549S381000, C549S432000, C514S183000, C514S453000, C514S468000

Reexamination Certificate

active

06881850

ABSTRACT:
The present invention relates to specific photochromic heterocyclically annellated indenochromene derivatives and the use thereof in plastics of all types, particularly for ophthalmic applications. In particular, the present invention relates to indeno[1,2-h]chromene derivatives having the following general formula (I) and indeno[2,1-f]chromene derivatives having the following general formula (II):

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