(19)

(11)

EP 1 289 572 A1

(12)

(43) Date of publication: 12.03.2003 Bulletin 2003/11 (21) Application number: 01942260.9 (22) Date of filing: 13.06.2001

(51) International Patent Classification (IPC)7: A61L 2/08, A61L 9/00, A61L 2/00, A01N 1/00, B01B 1/00, F24H 1/10 (86) International application number: PCT/US0140/956 (87) International publication number: WO 0109/5949 (20.12.2001 Gazette 2001/51)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 13.06.2000 US 212062 P (71) Applicant: Webco Industries, Inc. Sand Springs, OK 74063 (US)	(72) Inventor: WALKER, Brian, Keith Broken Arrow, OK 74014 (US) (74) Representative: Smith, Peter James et al Serjeants,25 The Crescent,King Street Leicester LE1 6RX Leicester LE1 6RX (GB)