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EP 3 877 557 A2

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(88) Date of publication A3: 11.06.2020 (43) Date of publication: 15.09.2021 Bulletin 2021/37 (21) Application number: 19870055.1 (22) Date of filing: 07.11.2019

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/02(2006.01) C22C 38/18(2006.01) C21D 8/04(2006.01) C22C 38/04(2006.01) C21D 6/00(2006.01) (52) Cooperative Patent Classification (CPC): C21D 8/0405; C21D 2211/005; C21D 8/02; C22C 38/18; C21D 8/0463; C22C 38/04; C22C 38/02; C21D 2211/002; C21D 8/0473; C21D 8/0273; C21D 8/0226; C21D 6/005; C21D 8/0205; C21D 8/0426; C21D 8/0263; C21D 8/04 (86) International application number: PCT/TR2019/050930 (87) International publication number: WO 2020/096555 (14.05.2020 Gazette 2020/20)

(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: KH MA MD TN (30) Priority: 08.11.2018 TR 201816840 (71) Applicants: Coskunoz Kalip Makina Sanayi ve Ticaret A.S. 16140 Bursa (TR) Ober Arge Teknolojileri Imalat Sanayi ve Ticaret Limited Sirketi 41275 Kocaeli (TR)

(72) Inventor: AKINCI, Volkan Bursa (TR) (74) Representative: Yamankaradeniz, Kemal  Destek Patent, Inc. Maslak Mah., Büyükdere Cad., No: 243, Kat: 13, Spine Tower, Sariyer, 34485 Istanbul 34485 Istanbul (TR)