(19)

(11)

EP 4 143 629 A1

(12)

(43) Date of publication: 08.03.2023 Bulletin 2023/10 (21) Application number: 21727645.0 (22) Date of filing: 29.04.2021

(51) International Patent Classification (IPC):  G02F 1/01(2006.01) G02B 26/00(2006.01) (52) Cooperative Patent Classification (CPC): G02F 1/0128; G02F 2201/12; G02B 26/00 (86) International application number: PCT/US2021/029916 (87) International publication number: WO 2021/222583 (04.11.2021 Gazette 2021/44)

(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: 01.05.2020 US 202016864837 (60) Divisional application: 22210992.8 22211009.0 (71) Applicant: Cardinal CG Company Eden Prairie, MN 55344 (US)	(72) Inventors: CHOWDHURY, Reaz Ahmed Cross Plains, WI 53528 (US) ARELLANO, Luis Octavio Muscoda, WI 53573 (US) BURROWS, Keith James Mineral Point, WI 53588 (US) (74) Representative: Hansson Thyresson AB  PO Box 73 201 20 Malmö 201 20 Malmö (SE)