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EP 3 247 516 A1

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(43) Date of publication: 29.11.2017 Bulletin 2017/48 (21) Application number: 16740623.0 (22) Date of filing: 20.01.2016

(51) International Patent Classification (IPC):  B22F 1/02(2006.01) C22C 29/00(2006.01) C09K 3/18(2006.01) (86) International application number: PCT/US2016/013995 (87) International publication number: WO 2016/118551 (28.07.2016 Gazette 2016/30)

(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 Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 21.01.2015 US 201562106140 P (71) Applicant: Sikorsky Aircraft Corporation Stratford, CT 06615 (US)

(72) Inventors: MCGEE, Randolph Carlton Hamden, Connecticut 06518 (US) DARDAS, Zissis A. Worcester, Massachusetts 01602 (US) SHE, Ying East Hartford, Connecticut 06118 (US) NARDI, Aaron T. East Granby, Connecticut 06026 (US) KLECKA, Michael A. Coventry, Connecticut 06238 (US) (74) Representative: Schmitt-Nilson Schraud Waibel Wohlfrom Patentanwälte Partnerschaft mbB  Destouchesstraße 68 80796 München 80796 München (DE)