(19)

(11)

EP 0 394 416 A1

(12)

(43) Date of publication: 31.10.1990 Bulletin 1990/44 (21) Application number: 89911977.0 (22) Date of filing: 17.10.1989

(51) International Patent Classification (IPC):  G02B 5/ 30( . ) G02C 7/ 10( . ) G02F 1/ 1333( . ) G02F 1/ 137( . ) C09K 19/ 54( . ) G02F 1/ 13( . ) G02F 1/ 1334( . ) (86) International application number: PCT/US1989/004665 (87) International publication number: WO 1990/004805 (03.05.1990 Gazette 1990/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 19.10.1988 US 19880259951 21.10.1988 US 19880261045 (71) Applicant: FERGASON, James L. Atherton, CA 94025 (US)	(72) Inventor: FERGASON, James L. Atherton, CA 94025 (US) (74) Representative: Crisp, David Norman  D. YOUNG & CO. 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)