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(11)

EP 2 247 761 A1

(12)

(43) Date of publication: 10.11.2010 Bulletin 2010/45 (21) Application number: 09713773.1 (22) Date of filing: 27.02.2009

(51) International Patent Classification (IPC):  C21C 7/064(2006.01) C22C 38/50(2006.01) C22C 38/44(2006.01) (86) International application number: PCT/US2009/035548 (87) International publication number: WO 2009/108892 (03.09.2009 Gazette 2009/36)

(84) Designated Contracting States: 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 SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 29.02.2008 US 32598 P (71) Applicant: CRS Holdings, Inc. Wilmington, DE 19801 (US)	(72) Inventors: KRIEBLE, Robert, Wayne Reading PA 19606 (US) MARTIN, William, Joseph Wyomissing PA 19610 (US) ZOGAS, Thomas, Constantine Sinking Spring PA 19608 (US) WERT, David, Elmer Wyomissing PA 19610 (US) NOVOTNY, Paul, Michael Mohnton PA 19540-2209 (US) (74) Representative: Gill, Stephen Charles et al Mewburn Ellis LLP 33 Gutter Lane London EC2V 8AS London EC2V 8AS (GB)