(19)

(11)

EP 0 966 402 A1

(12)

(43) Date of publication: 29.12.1999 Bulletin 1999/52 (21) Application number: 98902651.0 (22) Date of filing: 21.01.1998

(51) International Patent Classification (IPC):  C02F 1/ 44( . ) C02F 1/ 52( . ) C02F 1/ 48( . ) (86) International application number: PCT/US1998/001094 (87) International publication number: WO 1998/031637 (23.07.1998 Gazette 1998/29)

(84) Designated Contracting States: AT BE CH 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: 22.01.1997 US 19970787422 (71) Applicant: SEH AMERICA, INC. Vancouver, WA 98682-6776 (US)	(72) Inventors: VANDENSON, Brian, A. Vancouver, WA 98682 (US) JOHN, Joy, T. Battleground, WA 98604 (US) (74) Representative: Hucker, Charlotte Jane, et al  Gill Jennings & Every Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)