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(11)

EP 4 090 775 A1

(12)

(43) Date of publication: 23.11.2022 Bulletin 2022/47 (21) Application number: 21710867.9 (22) Date of filing: 25.01.2021

(51) International Patent Classification (IPC):  C14B 11/00(2006.01) A43D 95/06(2006.01) A43D 8/42(2006.01) D06B 1/14(2006.01) (52) Cooperative Patent Classification (CPC): C14B 11/00; A43D 8/42; A43D 95/06; D06B 1/141 (86) International application number: PCT/BG2021/000003 (87) International publication number: WO 2021/163770 (26.08.2021 Gazette 2021/34)

(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: 18.02.2020 BG 11308520 18.12.2020 BG 520020 (71) Applicant: PL Project Ltd. 6400 Dimitrovgrad (BG)	(72) Inventors: TZONEV, Plamen Dimitrov 1434 Sofia (BG) BORISOV, Lyubomir Todorov Gabrovo 5300 (BG) ROYDEV, Miroslav Dinchev Galabovo 6285 (BG) VELEV, Goran Valchev Shumen 9705 (BG) (74) Representative: Benatov, Samuil Gabriel  Dr. EMIL BENATOV & PARTNERS 6, Asen Peykov Str. 1113 Sofia 1113 Sofia (BG)