Inventor · disambiguated record
Osamu Nakai
Also filed as: NAKAI OSAMU
33 granted patents·8 pending applications·106 citations·filing 1978–2017
95Inventor score
Files withSUMITOMO METAL MINING CO27MITSUI HIROYUKI4KUBOTA LTD3KOBAYASHI HIROSHI2TOYO TIRE & RUBBER CO2
Top patents by PatentIndex Score
41 records- 0188US7964165B2Separation method for zinc sulfideSUMITOMO METAL MINING CO·Filed 2009·Granted Jun 21, 2011·10 cites·12 claims
- 0282US8343447B2Hydrometallurgical process for a nickel oxide oreSUMITOMO METAL MINING CO·Filed 2009·Granted Jan 1, 2013·4 cites·8 claims
- 0378US9970077B2Method for adding starting material slurry and sulfuric acid to autoclave in high pressure acid leaching process and autoclaveSUMITOMO METAL MINING CO·Filed 2013·Granted May 15, 2018·4 cites·4 claims
- 0478US9410226B2Ore slurry production method and metal refining methodSUMITOMO METAL MINING CO·Filed 2012·Granted Aug 9, 2016·2 cites·11 claims
- 0575US9732400B2Autoclave apparatus used during high-pressure acid leaching processSUMITOMO METAL MINING CO·Filed 2013·Granted Aug 15, 2017·3 cites·3 claims
- 0674US4294428AButterfly valveKUBOTA LTD·Filed 1980·Granted Oct 13, 1981·29 cites·7 claims
- 0773US9751035B2Operation method for dezincification plantSUMITOMO METAL MINING CO·Filed 2013·Granted Sep 5, 2017·2 cites·5 claims
- 0873US8916115B2Nickel recovery loss reduction method, hydrometallurgical method for nickel oxidized ore, and sulfuration treatment systemMATSUBARA SATOSHI·Filed 2012·Granted Dec 23, 2014·1 cites·4 claims
- 0973US8911531B2Hydrometallurgical plant of nickel laterite ore and operation method thereofNAKAI OSAMU·Filed 2010·Granted Dec 16, 2014·3 cites·18 claims
- 1071US9068241B2Method of producing ore slurryMITSUI HIROYUKI·Filed 2012·Granted Jun 30, 2015·1 cites·2 claims
- 1171US6519836B2Bolt press fit apparatusTOYO TIRE & RUBBER CO·Filed 2001·Granted Feb 18, 2003·11 cites·15 claims
- 1270US8747787B2Method for producing raw material for ferronickel smelting from low grade nickel oxide oreKOBAYASHI HIROSHI·Filed 2011·Granted Jun 10, 2014·1 cites·13 claims
- 1365US4273308ARotary valveKUBOTA LTD·Filed 1979·Granted Jun 16, 1981·19 cites·10 claims
- 1460US9719153B2Method for shortening operation shutdown time of high pressure acid leach equipment in a hydrometallurgical processSUMITOMO METAL MINING CO·Filed 2013·Granted Aug 1, 2017·0 cites·7 claims
- 1558US9561972B2Method for effluent treatment in smelting of nickel oxide oreSUMITOMO METAL MINING CO·Filed 2013·Granted Feb 7, 2017·0 cites·5 claims
- 1658US2010028227A1Hydrometallurgical process for nickel oxide oreSUMITOMO METAL MINING CO·Filed 2009·Application pending·0 cites
- 1757US9731980B2Processing device and processing method for hydrogen-sulphide-containing barren solutionSUMITOMO METAL MINING CO·Filed 2013·Granted Aug 15, 2017·0 cites·9 claims
- 1857US9139890B2Liquid storage apparatus and method of controlling the pressure in the sameMITSUI HIROYUKI·Filed 2011·Granted Sep 22, 2015·2 cites·8 claims
- 1955US6463781B2System for drawing outer cylinder of rubber bushTOYO TIRE & RUBBER CO·Filed 2001·Granted Oct 15, 2002·6 cites·5 claims
- 2052US2015315046A1Heavy-metal removal method and heavy-metal removal deviceSUMITOMO METAL MINING CO·Filed 2013·Application pending·0 cites
- 2150US10273558B2Ore slurry pre-treatment method and ore slurry manufacturing methodSUMITOMO METAL MINING CO·Filed 2015·Granted Apr 30, 2019·0 cites·5 claims
- 2249US10442715B2Chromium-containing water treatment methodSUMITOMO METAL MINING CO·Filed 2015·Granted Oct 15, 2019·0 cites·5 claims
- 2349US9321646B2Hydrogen sulfide gas production plant system and method for recovering and using hydrogen sulfide gasSUMITOMO METAL MINING CO·Filed 2013·Granted Apr 26, 2016·0 cites·8 claims
- 2448US9550674B2Plant for manufacturing hydrogen sulfide gas and method for exhausting hydrogen sulfide gasSUMITOMO METAL MINING CO·Filed 2013·Granted Jan 24, 2017·0 cites·12 claims
- 2548US9480956B2Hydrogen sulfide gas production plant and method for recovering and using waste hydrogen sulfide gasSUMITOMO METAL MINING CO·Filed 2013·Granted Nov 1, 2016·0 cites·5 claims
- 2648US2015337411A1Solid-liquid-separation processing method, and hydrometallurgical method for nickel oxide oreSUMITOMO METAL MINING CO·Filed 2013·Application pending·0 cites
- 2748US2016024614A1Hydrometallurgical plant for nickel oxide ore and method for operating the hydrometallurgical plantSUMITOMO METAL MINING CO·Filed 2014·Application pending·0 cites
- 2847US2015299007A1Neutralization treatment method and neutralizing agentSUMITOMO METAL MINING CO·Filed 2013·Application pending·0 cites
- 2946US9896740B2Method for operating flash vesselSUMITOMO METAL MINING CO·Filed 2012·Granted Feb 20, 2018·0 cites·2 claims
- 3046US9752211B2Neutralization method and neutralization plantSUMITOMO METAL MINING CO·Filed 2013·Granted Sep 5, 2017·0 cites·5 claims
- 3146US9751783B2Method for a treatment for wastewater containing aluminum, magnesium, and manganeseKOBAYASHI HIROSHI·Filed 2011·Granted Sep 5, 2017·0 cites·9 claims
- 3246US9068244B2Method for recovering chromite, and method for wet smelting of nickel oxide oreMITSUI HIROYUKI·Filed 2012·Granted Jun 30, 2015·0 cites·3 claims
- 3345US10017835B2Method for producing nickel sulfide and hydrometallurgical method for nickel oxide oreSUMITOMO METAL MINING CO·Filed 2015·Granted Jul 10, 2018·0 cites·5 claims
- 3445US9945007B2Dezincification plant, method for operating dezincification plant, and hydrometallurgical method for nickel oxide oreSUMITOMO METAL MINING CO·Filed 2013·Granted Apr 17, 2018·0 cites·5 claims
- 3545US9464341B2Flash vessel and method for operating sameSUMITOMO METAL MINING CO·Filed 2012·Granted Oct 11, 2016·0 cites·3 claims
- 3644US4174557AMethod of mounting valve seats in a butterfly valveKUBOTA LTD·Filed 1978·Granted Nov 20, 1979·8 cites·4 claims
- 3744US2021284547A1Method for recovering scandiumSUMITOMO METAL MINING CO·Filed 2017·Application pending·0 cites
- 3841US10351929B2Sulfuric acid adding facility and operation method thereforSUMITOMO METAL MINING CO·Filed 2016·Granted Jul 16, 2019·0 cites·3 claims
- 3940US2002070480A1Method and apparatus for forming vibration isolating rubber bushes, and jig for attaching metal parts which is to be used in the method of forming vibration isolating rubber bushesFiled 2001·Application pending·0 cites
- 4039US9651200B2Slurry-transporting facility and slurry transportation control methodSUMITOMO METAL MINING CO·Filed 2013·Granted May 16, 2017·0 cites·3 claims
- 4130US2013207325A1Wet smelting plant for nickel oxide ore and method of operating the sameMITSUI HIROYUKI·Filed 2011·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →