Inventor
KUDO KEIJI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “KUDO KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO METAL MINING CO
10 patentsUS7422621B2Sep 9, 2008
Method for concentrating precious metals contained in leaching residue discharged from copper hydrometallurgical process
SUMITOMO METAL MINING CO7 citations73
US10081851B2Sep 25, 2018
Method for recovering high-purity scandium
SUMITOMO METAL MINING CO2 citations70
US9963762B2May 8, 2018
Scandium recovery method
SUMITOMO METAL MINING CO2 citations70
US9347115B2May 24, 2016
Method for recovering rare earth element
SUMITOMO METAL MINING CO2 citations60
US9567239B2Feb 14, 2017
Method for producing high-purity nickel sulfate and method for removing impurity element from solution containing nickel
SUMITOMO METAL MINING CO1 citations51
US7449160B2Nov 11, 2008
Process of solvent extraction of copper
SUMITOMO METAL MINING CO0 citations51
US7138005B2Nov 21, 2006
Nickel refining method
SUMITOMO METAL MINING CO0 citations51
US10570480B2Feb 25, 2020
Method for recovering scandium
SUMITOMO METAL MINING CO0 citations50
US11214849B2Jan 4, 2022
Method for recovering scandium
SUMITOMO METAL MINING CO0 citations49
US10227675B2Mar 12, 2019
Wet smelting method for nickel oxide ore
SUMITOMO METAL MINING CO0 citations40
KOBAYASHI HIROSHI
3 patentsUS8580213B2Nov 12, 2013
Method for recovering nickel from sulfuric acid aqueous solution
KOBAYASHI HIROSHI4 citations60
US9751783B2Sep 5, 2017
Method for a treatment for wastewater containing aluminum, magnesium, and manganese
KOBAYASHI HIROSHI0 citations39
US9657370B2May 23, 2017
Removal method of manganese from waste water
KOBAYASHI HIROSHI0 citations39