(19)

(11)

EP 0 344 250 A1

(12)

(43) Date of publication: 06.12.1989 Bulletin 1989/49 (21) Application number: 88910009.0 (22) Date of filing: 27.10.1988

(51) International Patent Classification (IPC):  C12S 11/ 00( . ) D06M 101/ 00( . ) D06M 101/ 10( . ) D06M 16/ 00( . ) D06M 101/ 02( . ) D06M 101/ 12( . ) (86) International application number: PCT/EP1988/000971 (87) International publication number: WO 1989/003909 (05.05.1989 Gazette 1989/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 28.10.1987 CH 19870004214 (71) Applicant: SCHOELLER HARDTURM AG CH-8005 Zurich (CH)	(72) Inventors: CIAMPI, Luigi CH-4055 Basle (CH) FORSTER, Otto CH-8037 Zurich (CH) HAEFELY, Hans, Rudolf CH-8037 Zurich (CH) KNAUSEDER, Franz A-6322 Kirchbiehl (AT) (74) Representative: D'haemer, Jan Constant  Sandoz Technology Ltd. Patents and Trademarks Division CH-4002 Basle CH-4002 Basle (CH)