(19)

(11)

EP 0 840 932 A1

(12)

(43) Date of publication: 13.05.1998 Bulletin 1998/20 (21) Application number: 96926124.0 (22) Date of filing: 25.07.1996

(51) International Patent Classification (IPC):  C08G 83/ 00( . ) H01B 1/ 12( . ) (86) International application number: PCT/US1996/012183 (87) International publication number: WO 1997/005631 (13.02.1997 Gazette 1997/08)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 26.07.1995 US 19950001537P 13.10.1995 US 19950005257P (71) Applicant: DENDRITECH INCORPORATED Midland, MI 48642 (US)	(72) Inventors: MILLER, Larry, L. Minneapolis, MN 55416 (US) TOMALIA, Donald, A. Midland, MI 48640 (US) DUAN, Robert, G. Maplewood, MN 55109 (US) (74) Representative: Sheard, Andrew Gregory, et al  Kilburn & Strode 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)