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(11)

EP 1 448 306 A1

(12)

(43) Date of publication: 25.08.2004 Bulletin 2004/35 (21) Application number: 01994189.7 (22) Date of filing: 25.11.2001

(51) International Patent Classification (IPC)7: B03D 1/014, B03D 1/016, B03D 1/018, B03D 1/02, B03D 1/008 (86) International application number: PCT/US2001/047680 (87) International publication number: WO 2003/045566 (05.06.2003 Gazette 2003/23)

(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 (71) Applicant: Yoon, Roe-Hoan Blacksburg, VA 24060 (US)	(72) Inventor: Yoon, Roe-Hoan Blacksburg, VA 24060 (US) (74) Representative: Kierdorf, Theodor, Dipl.-Ing.  PatentanwälteLippert, Stachow, Schmidt & PartnerFrankenforster Strasse 135-137 51427 Bergisch Gladbach 51427 Bergisch Gladbach (DE)