Photochromic annelated naphthopyrane systems with special substituents, for attaining rapid lightening speeds

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United States of America Patent

PATENT NO 11965102
APP PUB NO 20210253865A1
SERIAL NO

17251445

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Abstract

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The present invention relates to new photochromic, fused naphthopyran systems having specific substituents R1, which can be used to attain very rapid lightening speeds, without detriment to the depth of darkening after excitation, and also to the use thereof in plastics of all kinds.

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Patent Owner(s)

Patent OwnerAddress
RODENSTOCK GMBH80687 MÜNCHEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rohlfing, Yven Munich, DE 13 20
Weigand, Udo Munich, DE 30 241
Zinner, Herbert Rohrbach, DE 20 230

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