(19)
(11) EP 1 140 892 A1

(12)

(43) Date of publication:
10.10.2001 Bulletin 2001/41

(21) Application number: 99954094.1

(22) Date of filing: 29.10.1999
(51) International Patent Classification (IPC)7C07D 311/92, G02B 5/23
(86) International application number:
PCT/GB9903/578
(87) International publication number:
WO 0035/902 (22.06.2000 Gazette 2000/25)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 15.12.1998 GB 9827596

(71) Applicant: JAMES ROBINSON LIMITED
Huddersfield,West Yorkshire HD1 6BU (GB)

(72) Inventors:
  • CLARKE, David Allan
    Rastrick,Brighouse HD6 3XD (GB)
  • HERON, Bernard Mark
    East Riding,Yorkshire HU15 1AB (GB)
  • GABBUTT, Christopher David
    Preston,Lancashire PR3 2YS (GB)
  • HEPWORTH, John David
    Preston,Lancashire PR2 7ER (GB)
  • PARTINGTON, Steven Michael
    Huddersfield HD7 4PG (GB)
  • CORNS, Stephen Nigel
    Salendine Nook,Huddersfield HD3 3XF (GB)

(74) Representative: Wain, Christopher Paul et al
A.A. Thornton & Co.235 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)

   


(54) PHOTOCHROMIC SUBSTIITUTED 2H-NAPHTHO[1,2-B]PYRANS