(19)

(11)

EP 1 368 927 A1

(12)

(43) Date of publication: 10.12.2003 Bulletin 2003/50 (21) Application number: 02753638.2 (22) Date of filing: 18.03.2002

(51) International Patent Classification (IPC)7: H04L 9/00 (86) International application number: PCT/US0207/964 (87) International publication number: WO 0207/6014 (26.09.2002 Gazette 2002/39)

(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: 16.03.2001 US 276598 P (71) Applicant: Purdue Research Foundation, Inc. West Lafayette, IN 47906 (US)	(72) Inventors: RICE, John, R. West Lafayette, IN 47906 (US) ATALLAH, Mikhail, J. West Lafayette, IN 47906 (US) (74) Representative: Tranter, Andrew David  Barker Brettell138 Hagley RoadEdgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)