Spiro-pyranic compounds endowed with photochromic characteristics

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Nov 18, 1997
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May 15, 1996
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May 18, 1993

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Abstract

Polymeric compositions comprising a polymer and photochromic compounds belonging to the class of spiro-pyrans, having the general formula (I): ##STR1##

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MINISTERO DELL `UNIVERSITA` E DELLA RICERCA SCIENTIFICA E TECNOLOGICA	ROME

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Inventor Name	Address	# of filed Patents	Total Citations
Allegrini, Pietro	Milan, IT	114	341
Crisci, Luciana	Milan, IT	12	110
Malatesta, Vincenzo	Milan, IT	13	63
Nodari, Nereo	Milan, IT	12	86

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Spiro-pyranic compounds endowed with photochromic characteristics

Number of patents in Portfolio can not be more than 2000

United States of America Patent

08644970

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PATENT NO	5688846
SERIAL NO	08644970
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08644970

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