(19)

(11)

EP 1 606 432 A1

(12)

(43) Date of publication: 21.12.2005 Bulletin 2005/51 (21) Application number: 04758177.2 (22) Date of filing: 20.03.2004

(51) International Patent Classification (IPC)7: C23F 11/02, C08K 3/00, C08L 67/02, C08L 67/04, C08L 77/12, C08K 3/22, C08K 3/36 (86) International application number: PCT/US2004/008694 (87) International publication number: WO 2004/087995 (14.10.2004 Gazette 2004/42)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 25.03.2003 US 396067 03.06.2003 US 453304 20.03.2004 US 805137 (71) Applicant: Northern Technologies International Corporation Beachwood, OH 44120 (US)	(72) Inventors: GENCER, Mehmet, A. Brecksville, OH 44141 (US) KUBIK, Donald, A. Dickenson, ND 58602 (US) NARAYAN, Ramani Okemos, MI 48864 (US) LYUBLINSKI, Efim, Ya. Solon, OH 44139 (US) (74) Representative: von Kreisler, Alek  Deichmannhaus am Dom, Postfach 10 22 41 50462 Köln 50462 Köln (DE)