(19)

(11)

EP 3 662 236 A1

(12)

(43) Date of publication: 10.06.2020 Bulletin 2020/24 (21) Application number: 18842974.0 (22) Date of filing: 06.08.2018

(51) International Patent Classification (IPC):  G01G 3/12(2006.01) G01L 1/20(2006.01) G01G 3/14(2006.01) G01L 1/22(2006.01) (86) International application number: PCT/US2018/045426 (87) International publication number: WO 2019/032470 (14.02.2019 Gazette 2019/07)

(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: 05.08.2017 US 201762541700 P (71) Applicant: Interface, Inc. Scottsdale, AZ 85260 (US)	(72) Inventors: BURROW, Lawrence, J. Scottsdaie, AZ 85260 (US) CLEGG, LaVar Scottsdaie, AZ 85260 (US) FUGE, Robert, T. Scottsdaie, AZ 85260 (US) PALMER, Brock Scottsdaie, AZ 85260 (US) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)