(19)

(11)

EP 1 145 083 A2

(12)

(43) Date of publication: 17.10.2001 Bulletin 2001/42 (21) Application number: 00939399.2 (22) Date of filing: 30.05.2000

(51) International Patent Classification (IPC)7: G03F 7/40 (86) International application number: PCT/US0014/797 (87) International publication number: WO 0073/856 (07.12.2000 Gazette 2000/49)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 01.06.1999 US 323979 (71) Applicant: BMC Industries, Inc. Minneapolis,MN 55423 (US)	(72) Inventor: JOHNSTON, Jeffrey, M. Waconia, MN 55387 (US) (74) Representative: Bowman, Paul Alan  LLOYD WISE, TREGEAR & CO.,Commonwealth House,1-19 New Oxford Street London WC1A 1LW London WC1A 1LW (GB)
	Remarks: WIPO A3 publication data is not currently available.