(19)

(11)

EP 2 588 408 A1

(12)

(43) Date of publication: 08.05.2013 Bulletin 2013/19 (21) Application number: 11797666.2 (22) Date of filing: 20.06.2011

(51) International Patent Classification (IPC):  C01B 31/08(2006.01) C10J 3/26(2006.01) (86) International application number: PCT/FI2011/050588 (87) International publication number: WO 2011/161314 (29.12.2011 Gazette 2011/52)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 21.06.2010 FI 20105717 (71) Applicant: Gasek OY 85900 Reisjärvi (FI)	(72) Inventor: KANGASOJA, Eero FI-85470 Kiiskilampi (FI) (74) Representative: Vanhala, Jorma Kalevi  Berggren Oy Ab Kirkkokatu 9 90100 Oulu 90100 Oulu (FI)