(19)

(11)

EP 3 973 558 A1

(12)

(43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 19929768.0 (22) Date of filing: 22.05.2019

(51) International Patent Classification (IPC):  H01F 27/32(2006.01) G01N 27/02(2006.01) H01F 27/28(2006.01) (52) Cooperative Patent Classification (CPC): H01F 27/32; H01F 27/2885; G01N 27/025 (86) International application number: PCT/US2019/018453 (87) International publication number: WO 2020/236129 (26.11.2020 Gazette 2020/48)

(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 (71) Applicant: R-Water LLC San Marcos, Texas 78666 (US)	(72) Inventor: REZANEZHAD GATABI, Javad San Marcos, Texas 78666 (US) (74) Representative: AWA Sweden AB  Box 5117 200 71 Malmö 200 71 Malmö (SE)