(19)

(11)

EP 0 778 850 A1

(12)

(43) Date of publication: 18.06.1997 Bulletin 1997/25 (21) Application number: 95928638.0 (22) Date of filing: 25.08.1995

(51) International Patent Classification (IPC):  C08B 30/ 16( . ) C08B 31/ 12( . ) C08B 31/ 00( . ) (86) International application number: PCT/NL1995/000283 (87) International publication number: WO 1996/006866 (07.03.1996 Gazette 1996/11)

(84) Designated Contracting States: BE DE FR IT NL (30) Priority: 31.08.1994 NL 19940001412 (71) Applicant: Rijksuniversiteit te Groningen 9712 CP Groningen (NL)	(72) Inventors: LAMMERS, Gerard NL-9712 CP Groningen (NL) BALT, Luuk NL-9712 CP Groningen (NL) STAMHUIS, Eize, Jacob NL-9712 CP Groningen (NL) BEENACKERS, Antonie, Albertus, Cornelis, Maria NL-9712 CP Groningen (NL) (74) Representative: Smulders, Theodorus A.H.J., Ir., et al  Vereenigde Octrooibureaux Nieuwe Parklaan 97 2587 BN 's-Gravenhage 2587 BN 's-Gravenhage (NL)