Inventor · disambiguated record
Heon Sik Choi
Also filed as: CHOI HEON SIK
8 granted patents·10 pending applications·5 citations·filing 2018–2024
75Inventor score
Top patents by PatentIndex Score
18 records- 0194US11926882B1Method for producing aqueous solution containing nickel or cobaltKOREA ZINC CO LTD·Filed 2023·Granted Mar 12, 2024·4 cites·22 claims
- 0292US12046727B2Method for recovery of valuable metals from spent secondary batteriesKOREA ZINC CO LTD·Filed 2023·Granted Jul 23, 2024·1 cites·8 claims
- 0380US2024286921A1Method for producing nickel sulfate solution for secondary battery from nickel cathodeKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 0480US2024218482A1Method for recovery of valuable metals from spent secondary batteriesKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 0579US12258282B2Method for producing nickel sulfate solution for secondary battery from nickel cathodeKOREA ZINC CO LTD·Filed 2023·Granted Mar 25, 2025·0 cites·1 claims
- 0675US12509744B2Method for preparing nickel sulfate aqueous solution from nickel-containing raw materialKOREA ZINC CO LTD·Filed 2024·Granted Dec 30, 2025·0 cites·30 claims
- 0774US12385108B2All-in-one nickel recovering method for nickel hydroxide recovery from raw materials containing nickelKOREA ZINC CO LTD·Filed 2024·Granted Aug 12, 2025·0 cites·23 claims
- 0874US12325894B2All-in-one nickel recovering method for nickel metal recovery from raw materials containing nickelKOREA ZINC CO LTD·Filed 2024·Granted Jun 10, 2025·0 cites·24 claims
- 0968US2025066875A1All-in-one nickel recovering method for nickel recovery from raw materials containing nickelKOREA ZINC CO LTD·Filed 2024·Application pending·0 cites
- 1066US12163204B2Method for producing aqueous solution containing nickel, cobalt and manganeseKOREA ZINC CO LTD·Filed 2023·Granted Dec 10, 2024·0 cites·17 claims
- 1166US2024368729A1Method for removing halide from waelz oxideKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 1266US2023213500A1Method for assessing validity of cell therapy productKOLON LIFE SCIENCE INC·Filed 2023·Application pending·0 cites
- 1366US2024218479A1Method for processing by-product of zinc hydrometallurgical process with reduced carbon emissionKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 1464US2024368730A1Method for leaching copper using pressure leaching techniqueKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 1563US2024376565A1Method for removing chlorine in zinc hydrometallurgyKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 1661US11614441B2Method for assessing validity of cell therapy productKOLON LIFE SCIENCE INC·Filed 2018·Granted Mar 28, 2023·0 cites·14 claims
- 1757US2024344173A1Method for manufacturing high-grade refined iron oxide from iron oxide as by-product of zinc smelting processKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
- 1855US2024327936A1Method for recovering iron and valuable metals from electric arc furnace dustKOREA ZINC CO LTD·Filed 2023·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →