(19)

(11)

EP 1 492 860 A1

(12)

(43) Date of publication: 05.01.2005 Bulletin 2005/01 (21) Application number: 03743409.9 (22) Date of filing: 28.02.2003

(51) International Patent Classification (IPC)7: C11C 5/00 (86) International application number: PCT/GB2003/000840 (87) International publication number: WO 2003/074642 (12.09.2003 Gazette 2003/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 01.03.2002 GB 0204803 (71) Applicant: Inovair Limited London TW1 4SB (GB)	(72) Inventor: MAAT, Huib Strawberry Hill,London TW1 4SB (GB) (74) Representative: Patentanwälte Wenzel & Kalkoff  Postfach 73 04 66 22124 Hamburg 22124 Hamburg (DE)