(19)

(11)

EP 3 765 236 A1

(12)

(43) Date of publication: 20.01.2021 Bulletin 2021/03 (21) Application number: 19767226.4 (22) Date of filing: 13.03.2019

(51) International Patent Classification (IPC):  B24B 3/54(2006.01) B24B 21/08(2006.01) B24B 21/12(2006.01) B24B 21/20(2006.01) B24B 3/36(2006.01) B24B 21/10(2006.01) B24B 21/14(2006.01) (86) International application number: PCT/US2019/021962 (87) International publication number: WO 2019/178171 (19.09.2019 Gazette 2019/38)

(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: 13.03.2018 US 201815919850 (71) Applicant: DAREX, LLC Ashland, OR 97520 (US)	(72) Inventor: DOVEL, Daniel, T. Shady Cove, OR 97539 (US) (74) Representative: J A Kemp LLP  14 South Square Gray's Inn London WC1R 5JJ London WC1R 5JJ (GB)