(19)

(11)

EP 1 203 195 A1

(12)

(43) Date of publication: 08.05.2002 Bulletin 2002/19 (21) Application number: 00958015.0 (22) Date of filing: 18.07.2000

(51) International Patent Classification (IPC)7: F28F 9/22 (86) International application number: PCT/US0040/401 (87) International publication number: WO 0107/857 (01.02.2001 Gazette 2001/05)

(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: 21.07.1999 US 144948 P (71) Applicant: Washington Group International, Inc. Boise,Idaho 83712 (US)	(72) Inventors: LARSEN, Thomas, L. Andover, MA 01810 (US) JAYASWAL, Umesh, K. Watertown, MA 02472-1567 (US) (74) Representative: Lucas, Brian Ronald  Lucas & Co.135 Westhall Road WarlinghamSurrey CR6 9HJ WarlinghamSurrey CR6 9HJ (GB)