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(11)

EP 3 504 577 A1

(12)

(43) Date of publication: 03.07.2019 Bulletin 2019/27 (21) Application number: 17842477.6 (22) Date of filing: 25.08.2017

(51) International Patent Classification (IPC):  G02B 21/36(2006.01) G02B 26/10(2006.01) G02B 21/26(2006.01) G02B 5/20(2006.01) (86) International application number: PCT/CA2017/000196 (87) International publication number: WO 2018/035597 (01.03.2018 Gazette 2018/09)

(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: MA MD (30) Priority: 26.08.2016 US 201662380224 P (71) Applicant: Huron Technologies International Inc. Waterloo, Ontario N2L 5V4 (CA)	(72) Inventor: DIXON, Arthur Edward Waterloo Ontario N2K 3R2 (CA) (74) Representative: Richards, John et al Ladas & Parry LLP Temple Chambers 3-7 Temple Avenue London EC4Y 0DA Temple Chambers 3-7 Temple Avenue London EC4Y 0DA (GB)