(19)

(11)

EP 0 906 475 A1

(12)

(43) Date of publication: 07.04.1999 Bulletin 1999/14 (21) Application number: 96936584.0 (22) Date of filing: 17.10.1996

(51) International Patent Classification (IPC):  E01F 9/ 04( . ) E01F 9/ 00( . ) E01F 9/ 03( . ) C04B 28/ 02( . ) E01F 9/ 015( . ) E01F 9/ 053( . ) (86) International application number: PCT/US1996/016590 (87) International publication number: WO 1997/048855 (24.12.1997 Gazette 1998/03)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 21.06.1996 US 19960668115 (71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY St. Paul, Minnesota 55133-3427 (US)	(72) Inventors: ERICKSON, Randall, L. Saint Paul, MN 55133-3427 (US) HURLOCKER, L., Max Saint Paul, MN 55133-3427 (US) RICH, Larry, D. Saint Paul, MN 55133-3427 (US) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 81675 München 81675 München (DE)