(19)

(11)

EP 4 007 663 A2

(12)

(88) Date of publication A3: 24.03.2022 (43) Date of publication: 08.06.2022 Bulletin 2022/23 (21) Application number: 21855035.8 (22) Date of filing: 05.11.2021

(51) International Patent Classification (IPC):  B21B 1/46(2006.01) C22F 3/00(2006.01) B22D 11/124(2006.01) (52) Cooperative Patent Classification (CPC): B22D 11/124; C22F 3/00; B21B 1/46 (86) International application number: PCT/CA2021/051578 (87) International publication number: WO 2022/032400 (17.02.2022 Gazette 2022/07)

(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: 06.11.2020 US 202063110568 P 13.10.2021 US 202163262448 P (71) Applicant: Hazelett Castechnology ULC Calgary AB T2E 6Z3 (CA)	(72) Inventors: TRUMAN GALLERNEAULT, Willard Mark Kingston, Ontario K0H 1S0 (CA) YUAN, Zhixue Colchester, Vermont 05446 (US) LI, Jingzhu Colchester, Vermont 05446 (US) HOWELLS, Andrew David Bath, Ontario K0H 1G0 (CA) (74) Representative: v. Bezold & Partner Patentanwälte - PartG mbB  Ridlerstraße 57 80339 München 80339 München (DE)