(19)

(11)

EP 0 953 130 A2

(12)

(43) Date of publication: 03.11.1999 Bulletin 1999/44 (21) Application number: 98903472.0 (22) Date of filing: 13.01.1998

(51) International Patent Classification (IPC):  G02B 6/ 00( . ) G02B 27/ 28( . ) G02F 1/ 13357( . ) G09F 19/ 12( . ) F21V 8/ 00( . ) G02F 1/ 1335( . ) G09F 9/ 00( . ) (86) International application number: PCT/US1998/000632 (87) International publication number: WO 1998/033006 (30.07.1998 Gazette 1998/30)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 13.01.1997 US 19970783212 (71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY St. Paul, Minnesota 55133-3427 (US)	(72) Inventors: WINSTON, Roland Chicago, IL 60615 (US) HOLMAN, Robert, L. Evanston, IL 60202 (US) JACOBSON, Benjamin, A. Chicago, IL 60615 (US) EMMONS, Robert, M., Apartment 224 Woodbury, MN 55125 (US) GLECKMAN, Philip Yorktown Heights, NY 10598 (US) (74) Representative: Lawrence, John  Barker Brettell 138 Hagley Road Edgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)