Essilor International (compagnie Generale D'optique)

James Robinson Limited

Essilor International

Alphamicron, Inc.

Vivimed Labs Europe Ltd

Bernard Mark Heron

Stuart Aiken

Christopher David Gabbutt

Samuel Archambeau

Claudine Biver

Fabien Berit-Debat

Steven Michael Partington

John David Hepworth

Stephen Nigel Corns

David A Clarke

Jean-Paul Cano

Thomas David Broadbent

Bahman Taheri

Tamas Kosa

Ludmila Sukhomlinova

Sandrine Duluard

Linli Su

David Allan Clarke

Daniel Luke Crossley

Christopher Stephen Kershaw

Nicola Jane Smith

Thomas D Broadbent

Daniel L Crossley

Georgina K Armitage

Jean Paul Cano

Christopher David Gabbut

Christoper David Gabbutt

The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Electrochromic compounds and optical articles containing them

Electrochromic compounds and optical articles containing them The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials having two-core viologens and the use of these two-core viologens as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Electrochromic two-core viologen derivatives and optical articles containing them

The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials based on either single or two-core viologen systems and the use of these viologen systems as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Electrochromic single and two-core viologens and optical articles containing them

A naphthopyran compound represented by the formula (I): wherein:

3H-naphtho [2,1-B] pyrans as photochromic dichroic dyes and optical article containing them

A naphthopyran compound represented by the formulae (I) to (II) wherein: &#x2014;mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive; &#x2014;Ri, R2 and R4, represent a group selected from halogen, H, &#x2014;Ra, aryl, &#x2014;OH, &#x2014;ORa, &#x2014;SH, &#x2014;SRa, &#x2014;NH2, &#x2014;NR8RaI, &#x2014;NRbRc, &#x2014;NRal-CORa, &#x2014;NRaiCO(aryl), &#x2014;NRai aryl, &#x2014;N-aryfe, &#x2014;N(aryl)CO(aryl), &#x2014;CO&#x2014;R3, &#x2014;CO2R3I, &#x2014;OC(O)&#x2014;Rd, and &#x2014;X&#x2014;(Re)&#x2014;Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, Rai, Rb, Rc, X, Y, Re, Rd are as defined into the description; &#x2014;Zi re resent a group selected from: (formules).

Photochromic dichroic naphtho-pyrans and optical articles containing them

A naphthopyran compound represented by the formula (I) wherein: n, n, p, m and q represent an integer; R, Rand R, represent a group selected from halogen, &#x2014;R, &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR, &#x2014;NH, &#x2014;NRR, &#x2014;NRR, &#x2014;CO&#x2014;R, &#x2014;COR, &#x2014;OC(O)&#x2014;R, &#x2014;X&#x2014;(R)&#x2014;Y, linear or branched (C-C) perfluoroalkyl group, wherein R, R, R, R, X, Y, R, and Rare as defined in the description; Z represents a group selected from CO, CS, SO, SO, CO, C(O)S, CS, C(O)NH, C(O)NR, C(S)NH, C(S)NRand C&#x2550;NR; Rrepresents a group selected from halogen, &#x2014;R, linear or branched (C) perfluoroalkyl group &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR, &#x2014;NH, and &#x2014;NRR; Rrepresents a group selected from &#x2014;Rwhich may be optionally substituted, linear or branched (C) perfluoroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl, which may be optionally substituted; Rrepresents a group selected from: halogen, &#x2014;R, linear or branched (C) perfluoroalkyl group, &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR, &#x2014;NH, &#x2014;NRR, &#x2014;CO&#x2014;R, &#x2014;O&#x2014;C(O)&#x2014;Rand &#x2014;COR; or when q is equal to 2, then two Rtogether represents further a group &#x2014;O&#x2014;(CH)&#x2014;O&#x2014; wherein q1 represents an integer comprised from 1 to 3 inclusive. 

6-(biphenyl-ester)-3H-naphtho[2,1-b]pyrans as photochromic dichroic dyes and optical article containing them

A photochromic grey coloring 2H-naphtho&lsqb;1,2-b&rsqb;pyran of formula (1) wherein R is selected from mono-, di- or poly-substituted aryl groups, mono-, di- or poly-substituted naphthyl groups and mono-, di- or poly-substituted heteroaryl groups, wherein at least one substituent is a nitrogen containing group, including amino, C -C and C -C alkylamino, C -C and C -C dialkylamino, C -C dialkenylamino, C -C or C -C di(polyalkenyl)amino, arylamino, diarylamino, C -C alkylarylamino, tetra (C -C linear or branched alkyl) guanidino and cyclic-amino groups and at least one of R and R , which may be the same or different, is selected from C -C N alkylamino C -C N-alkylamido, C -C N,N-dialkylamido, amido, nitro, amino, C -C alkylamino, C -C dialkylamino, C -C dialkenylamino, C -C di(polyalkenyl)amino, arylamino, diarylamino, C -C alkylarylamino, or cyclicamino groups. The compounds may be combined with a polymeric host material such as plastic or glass to make a sunglass lens, an ophthalmic lens or a window. The compounds may also be included in an ink or a fuel.

Grey coloring photochromic fused pyrans

A photochromic compound has the formula (I) wherein R,is selected from the group including substituted amino aryl moieties, substituted cyclic amino aryl moieties and substituted N-indolinoaryl or N-tetrahydroquinolino aryl groups, R,is selected from the group including linear or branched C,-C,alkyl, linear or branched C,-C,alkenyl or polyalkenyl, C,-C,alkynyl or polyalkynyl, aryl, heteroaryl, linear or branched C,-C,alkyl aryl, linear or branched C,-C,alkyl-cycloalkyl or -bicycloalkyl or -tricycloalkyl or substituted -cycloalkyl or -bicycloalkyl or -tricycloalkyl, linear or branched C,-C,haloalkyl or perhaloalkyl, linear or branched C,-C,alkoxyalkyl or peralkoxyalkyl, linear or branched C,-C,alkylthioalkyl or peralkylthioalkyl, linear or branched C,-C,amino alkyl or peraminoalkyl, C,-C,cycloalkyl or substituted cycloalkyl, C,-C,bicycloalkyl or substituted bicycloalkyl, C,-C,tricycloalkyl or substituted tricycloalkl or linear or branched C,-C,hydroxyalkyl or perhydroxyalkyl; R,and R,which may be the same or different are R,or R,and R,are conjoined to form a spiro linked C,-C,cyclic system or substituted cyclic system; and wherein R,and R,are each selected from R,or hydrogen, halogen, nitro, nitroso, amino, acetamido, C,-C,N-alkylamido, alkoxycarbonyl, nitrile, carboxy, hydroxy, aryloxy, C,-C,alkoxy, a heteroatom which is O or N or S or P which in turn can be bonded either singly or multiply to carbon, oxygen, sulphur or nitrogen, C,-C,alkoxy or alkylthio or aryl or aryloxy or multiples thereof.

Photochromic compounds

Red coloring hyperchromic compounds have the formula:

Red coloring hyperchromic 3H-naphtho&lsqb;2,1-B&rsqb;pyrans

Compositions comprising a naphtho &lsqb;1,2-b&rsqb;pyran of formula (I):

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Brough, United Kingdom

Bernard Mark Heron