(19)

(11)

EP 3 941 886 A1

(12)

(43) Date of publication: 26.01.2022 Bulletin 2022/04 (21) Application number: 20716208.2 (22) Date of filing: 17.03.2020

(51) International Patent Classification (IPC):  C03C 17/36(2006.01) (52) Cooperative Patent Classification (CPC): C03C 17/3607; C03C 17/3681; C03C 17/3618; C03C 17/3639; C03C 17/3636; C03C 17/36; C03C 17/3644; C03C 17/3613; C03C 17/366 (86) International application number: PCT/IB2020/052404 (87) International publication number: WO 2020/188477 (24.09.2020 Gazette 2020/39)

(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: 18.03.2019 US 201916355966 (71) Applicant: Guardian Glass, LLC Auburn Hills MI 48326 (US)

(72) Inventors: XU, Yongli Auburn Hills, Michigan 48326 (US) BOYCE, Brent Auburn Hills, Michigan 48326 (US) BOUSSAAD, Salah AUBURN HILLS, Michigan 48326 (US) LINGLE, Philip AUBURN HILLS, Michigan 48326 (US) LAO, Jingyu AUBURN HILLS, Michigan 48326 (US) VERNHES, Richard AUBURN HILLS, Michigan 48326 (US) (74) Representative: Hoyng Rokh Monegier B.V.  Rembrandt Tower, 30th Floor Amstelplein 1 1096 HA Amsterdam 1096 HA Amsterdam (NL)