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(11)

EP 4 466 383 A1

(12)

(43) Date of publication: 27.11.2024 Bulletin 2024/48 (21) Application number: 23743092.1 (22) Date of filing: 21.01.2023

(51) International Patent Classification (IPC):  C21C 7/064(2006.01) C21C 1/02(2006.01) (52) Cooperative Patent Classification (CPC): C21C 7/064; C21C 1/02; C21C 1/025; C21B 2400/02; C21C 2300/02; C21B 3/06; C21C 7/06 (86) International application number: PCT/IN2023/050066 (87) International publication number: WO 2023/139609 (27.07.2023 Gazette 2023/30)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 21.01.2022 IN 202231003501 (71) Applicant: Jamipol Limited Jharkhand 831007 (IN)	(72) Inventors: YADAV, Raj Kumar Jamshedpur Jharkhand 831007 (IN) CHAKRABORTY, Sambhunath Jamshedpur Jharkhand 831007 (IN) PRAHARSHA, Repaka Lakshmi Jamshedpur Jharkhand 831007 (IN) SANYAL, Sarbendu Jamshedpur Jharkhand 831007 (IN) (74) Representative: Cabinet Becker et Associés  25, rue Louis le Grand 75002 Paris 75002 Paris (FR)