(19)

(11)

EP 0 086 192 A1

(12)

(43) Date of publication: 24.08.1983 Bulletin 1983/34 (21) Application number: 81902427.0 (22) Date of filing: 26.08.1981

(51) International Patent Classification (IPC):  A61L 26/ 00( . ) A61L 33/ 06( . ) C08G 18/ 08( . ) C08G 18/ 48( . ) C08G 18/ 75( . ) A61L 29/ 08( . ) C08G 18/ 00( . ) C08G 18/ 10( . ) C08G 18/ 73( . ) C09D 175/ 00( . ) (86) International application number: PCT/US1981/001156 (87) International publication number: WO 1983/000695 (03.03.1983 Gazette 1983/06)

(84) Designated Contracting States: DE FR GB (71) Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY Cambridge, MA 02139 (US)	(72) Inventors: MERRILL, Edward W. Belmont, MA 02178 (US) WAN, Stephen S. Flushing, NY 11355 (US) (74) Representative: Patentanwälte Zellentin & Partner  Zweibrückenstrasse 15 D-80331 München D-80331 München (DE)