(19)

(11)

EP 1 869 164 A2

(12)

(88) Date of publication A3: 13.09.2007 (43) Date of publication: 26.12.2007 Bulletin 2007/52 (21) Application number: 06736603.9 (22) Date of filing: 01.03.2006

(51) International Patent Classification (IPC):  C12N 5/00(2006.01) A61K 49/00(2006.01) C12M 3/00(2006.01) A61L 27/38(2006.01) (86) International application number: PCT/US2006/007312 (87) International publication number: WO 2006/094076 (08.09.2006 Gazette 2006/36)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 02.03.2005 US 658421 P 22.09.2005 US 719850 P 11.11.2005 US 735312 P (71) Applicant: DONALDSON COMPANY, INC. Minneapolis, MN 55440-1299 (US)

(72) Inventors: SCHINDLER, Melvin, Steve Piscataway, New Jersey 08854 (US) MEINERS, Sally, Ann Piscataway, New Jersey 08854 (US) NUR-E-KAMAL, Mohammed, Shah, Alam Edison, New Jersey 08817 (US) CHUNG, Hoo, Young Bloomington, Minnesota 55437 (US) WEIK, Thomas, M. Deephaven, Minnesota 55391 (US) GRAFE, Timothy, H. Edina, Minnesota 55416 (US) (74) Representative: Eisenführ, Speiser & Partner  Patentanwälte Rechtsanwälte Postfach 10 60 78 28060 Bremen 28060 Bremen (DE)