Inventor
CHOI HEON SIK
KR9 patents
⚠️ This page may combine multiple inventors who share the name “CHOI HEON SIK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KOREA ZINC CO LTD
8 patentsUS11926882B1Mar 12, 2024
Method for producing aqueous solution containing nickel or cobalt
KOREA ZINC CO LTD4 citations71
US12046727B2Jul 23, 2024
Method for recovery of valuable metals from spent secondary batteries
KOREA ZINC CO LTD1 citations59
US12509744B2Dec 30, 2025
Method for preparing nickel sulfate aqueous solution from nickel-containing raw material
KOREA ZINC CO LTD0 citations57
US12258282B2Mar 25, 2025
Method for producing nickel sulfate solution for secondary battery from nickel cathode
KOREA ZINC CO LTD0 citations50
US12516398B2Jan 6, 2026
All-in-one nickel recovering method for recovery of nickel oxide from raw materials containing nickel
KOREA ZINC CO LTD0 citations46
US12385108B2Aug 12, 2025
All-in-one nickel recovering method for nickel hydroxide recovery from raw materials containing nickel
KOREA ZINC CO LTD0 citations46
US12325894B2Jun 10, 2025
All-in-one nickel recovering method for nickel metal recovery from raw materials containing nickel
KOREA ZINC CO LTD0 citations46
US12163204B2Dec 10, 2024
Method for producing aqueous solution containing nickel, cobalt and manganese
KOREA ZINC CO LTD0 citations39