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EP 1 381 646 A1

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(43) Date of publication: 21.01.2004 Bulletin 2004/04 (21) Application number: 02739151.5 (22) Date of filing: 16.04.2002

(51) International Patent Classification (IPC)7: C08K 5/01, C07B 63/04, C01B 31/02, A61K 6/083 (86) International application number: PCT/US2002/011978 (87) International publication number: WO 2002/085974 (31.10.2002 Gazette 2002/44)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 23.04.2001 DE 10119831 (71) Applicant: DENTSPLY INTERNATIONAL, INC. York, PA 17405-0872 (US)	(72) Inventors: Walz, Uwe 78465 Konstanz (DE) KLEE, Joachim, E. 78315 Radolfzell (DE) (74) Representative: Hartz, Nikolai F., Dr.  Wächtershäuser & HartzPatentanwälteWeinstrasse 8 80333 München 80333 München (DE)