(19)

(11)

EP 3 873 729 A1

(12)

(43) Date of publication: 08.09.2021 Bulletin 2021/36 (21) Application number: 18938282.3 (22) Date of filing: 31.10.2018

(51) International Patent Classification (IPC):  B30B 9/12(2006.01) B30B 9/18(2006.01) B30B 9/16(2006.01) B30B 9/26(2006.01) (86) International application number: PCT/US2018/058429 (87) International publication number: WO 2020/091759 (07.05.2020 Gazette 2020/19)

(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: Process Wastewater Technologies, LLC Rosedale, MD 21237 (US)	(72) Inventor: HUNT, Edwin, R. Rosedale, MD 21237 (US) (74) Representative: Hoefer & Partner Patentanwälte mbB  Pilgersheimer Straße 20 81543 München 81543 München (DE)