Assignee
NITTETSU MINING CO LTD
JP·44 granted patents·12 pending applications·798 citations·filing 1981–2025
Top patents by PatentIndex Score
56 records- 0191US5985466APowder having multilayered film on its surface and process for preparing the sameNITTETSU MINING CO LTD·Filed 1996·Granted Nov 16, 1999·102 cites·40 claims
- 0283US5264030AFiller for degradable plastics and process for producing the sameNITTETSU MINING CO LTD·Filed 1992·Granted Nov 23, 1993·61 cites·16 claims
- 0382US6666991B1Fluorescent or phosphorescent compositionNITTETSU MINING CO LTD·Filed 1999·Granted Dec 23, 2003·42 cites·9 claims
- 0480US5763085APowder having at least one layer and process for preparing the sameNITTETSU MINING CO LTD·Filed 1995·Granted Jun 9, 1998·52 cites·20 claims
- 0580US4347124AMethod and device of separating materials of different density by ferromagnetic liquidNITTETSU MINING CO LTD·Filed 1981·Granted Aug 31, 1982·37 cites·3 claims
- 0678US6440322B1Magnetic fluid and process for the production thereofNITTETSU MINING CO LTD·Filed 1998·Granted Aug 27, 2002·32 cites·5 claims
- 0777US6280658B1Rheological fluidNITTETSU MINING CO LTD·Filed 1997·Granted Aug 28, 2001·29 cites·12 claims
- 0877US5607490AFilter having chemical resistance, antistatic property and water vapor resistance, and process for producing the sameNITTETSU MINING CO LTD·Filed 1995·Granted Mar 4, 1997·38 cites·14 claims
- 0976US6818297B1White powder and method for production thereofNITTETSU MINING CO LTD·Filed 2000·Granted Nov 16, 2004·19 cites·18 claims
- 1076US6207280B1Multilayer-coated powder and process for producing the sameNITTETSU MINING CO LTD·Filed 1997·Granted Mar 27, 2001·39 cites·6 claims
- 1176US2025282637A1Method for producing cobalt ferrite particles and cobalt ferrite particles produced by sameNITTETSU MINING CO LTD·Filed 2025·Application pending·0 cites
- 1272US6987868B1Genuine/counterfeit discriminating method, genuine/counterfeit discrimination object, and genuine/counterfeit discriminating deviceNITTETSU MINING CO LTD·Filed 1999·Granted Jan 17, 2006·44 cites·13 claims
- 1371US7060127B2Silica-calcium carbonate composite particlesNITTETSU MINING CO LTD·Filed 2001·Granted Jun 13, 2006·8 cites·1 claims
- 1470US7985397B2Method of treating hydrogen sulfide, method of producing hydrogen, and photocatalytic-reaction apparatusNITTETSU MINING CO LTD·Filed 2006·Granted Jul 26, 2011·2 cites·10 claims
- 1569US6991677B2Titanium dioxide-calcium carbonate composite particlesNITTETSU MINING CO LTD·Filed 2001·Granted Jan 31, 2006·9 cites·13 claims
- 1668US7922991B2Basic magnesium carbonate, production method and use of the sameNITTETSU MINING CO LTD·Filed 2003·Granted Apr 12, 2011·7 cites·31 claims
- 1767US6261691B1Powder coated with multilayer coatingNITTETSU MINING CO LTD·Filed 1997·Granted Jul 17, 2001·27 cites·14 claims
- 1867US5935608AAntibacterial titania and process for producing the sameNITTETSU MINING CO LTD·Filed 1997·Granted Aug 10, 1999·21 cites·5 claims
- 1966US5558689AReinforced filter elementNITTETSU MINING CO LTD·Filed 1995·Granted Sep 24, 1996·39 cites·32 claims
- 2064US7608557B2Highly active photocatalyst and process for producing the sameNITTETSU MINING CO LTD·Filed 2003·Granted Oct 27, 2009·5 cites·22 claims
- 2164US6337061B1Method for reclaiming metal sulfate-containing waste sulfuric acidNITTETSU MINING CO LTD·Filed 1994·Granted Jan 8, 2002·21 cites·3 claims
- 2263US12338134B2Method for producing cobalt ferrite particles and cobalt ferrite particles produced by sameNITTETSU MINING CO LTD·Filed 2020·Granted Jun 24, 2025·0 cites·6 claims
- 2363US2023395290A1Semi-hard magnetic powder having a high value and method for synthesizing sameNITTETSU MINING CO LTD·Filed 2023·Application pending·0 cites
- 2462US5088651ARoll crusher and crushing method in use for the roll crusherNITTETSU MINING CO LTD·Filed 1990·Granted Feb 18, 1992·18 cites·5 claims
- 2561US7704914B2Photocatalyst and process for producing the sameNITTETSU MINING CO LTD·Filed 2002·Granted Apr 27, 2010·4 cites·5 claims
- 2659US12540082B2Cobalt ferrite particle production method and cobalt ferrite particles produced therebyNITTETSU MINING CO LTD·Filed 2020·Granted Feb 3, 2026·0 cites·13 claims
- 2757US7347979B2Gas processing method and gas processing apparatus utilizing oxidation catalyst and low-temperature plasmaNITTETSU MINING CO LTD·Filed 2004·Granted Mar 25, 2008·4 cites·10 claims
- 2857US2024124952A1Method for producing low-arsenic copper concentrateNITTETSU MINING CO LTD·Filed 2022·Application pending·0 cites
- 2957US2025197243A1Cobalt ferrite particle production method and cobalt ferrite particles produced therebyNITTETSU MINING CO LTD·Filed 2023·Application pending·0 cites
- 3055US7169443B2Powder coated with titania film and method for production thereofNITTETSU MINING CO LTD·Filed 2002·Granted Jan 30, 2007·3 cites·3 claims
- 3154US2025196038A1Method to form a dust collecting layer on a porous body without using a binderNITTETSU MINING CO LTD·Filed 2025·Application pending·0 cites
- 3253US7399522B2Heat-resistant filter element and method for production thereofNITTETSU MINING CO LTD·Filed 2002·Granted Jul 15, 2008·1 cites·2 claims
- 3353US6110633AColor magnetic toner and process for producing the sameNITTETSU MINING CO LTD·Filed 1997·Granted Aug 29, 2000·10 cites·5 claims
- 3453US4383890ACeramic sheet and method for producing the sameNITTETSU MINING CO LTD·Filed 1981·Granted May 17, 1983·15 cites·11 claims
- 3552US6162469AMedical powderNITTETSU MINING CO LTD·Filed 1997·Granted Dec 19, 2000·13 cites·5 claims
- 3651US5080847AManufacturing method of filter element for dust collectorNITTETSU MINING CO LTD·Filed 1990·Granted Jan 14, 1992·18 cites·3 claims
- 3749US8034404B2Method for producing white powder comprising titanium oxide film and metallic silver filmNITTETSU MINING CO LTD·Filed 2003·Granted Oct 11, 2011·2 cites·7 claims
- 3849US2022001354A1Coating solutionNITTETSU MINING CO LTD·Filed 2019·Application pending·0 cites
- 3948US2005235872A1Silica-calcium carbonate composite particlesNITTETSU MINING CO LTD·Filed 2005·Application pending·0 cites
- 4047US2005003192A1Consolidated material of coated powders and process for producing the sameNITTETSU MINING CO LTD·Filed 2004·Application pending·0 cites
- 4146US7566499B2Light interference multi-layered film-coated powder design method, manufacturing method, and light interference multi-layered film-coated powderNITTETSU MINING CO LTD·Filed 2002·Granted Jul 28, 2009·2 cites·8 claims
- 4245US6387532B1Coated powder and process for the preparation thereofNITTETSU MINING CO LTD·Filed 1998·Granted May 14, 2002·9 cites·12 claims
- 4342US7399333B2Filter element and process for producing the sameNITTETSU MINING CO LTD·Filed 2003·Granted Jul 15, 2008·2 cites·4 claims
- 4441US5531906AProcess for treatment of sodium hydroxide waste liquor containing aluminumNITTETSU MINING CO LTD·Filed 1994·Granted Jul 2, 1996·6 cites·13 claims
- 4539US2009178915A1Gas-exciting apparatus having electrode containing insulating coating layer and gas-exciting processNITTETSU MINING CO LTD·Filed 2005·Application pending·0 cites
- 4638US4551240AApparatus for classifying particulate material with air currentsNITTETSU MINING CO LTD·Filed 1984·Granted Nov 5, 1985·10 cites·3 claims
- 4737US6517627B1Additive pigment powdersNITTETSU MINING CO LTD·Filed 1997·Granted Feb 11, 2003·8 cites·6 claims
- 4836US6863979B2Consolidated material of coated powders and process for producing sameNITTETSU MINING CO LTD·Filed 1997·Granted Mar 8, 2005·4 cites·2 claims
- 4936US6199605B1Medium dispensing apparatus and a method for the sameNITTETSU MINING CO LTD·Filed 1998·Granted Mar 13, 2001·15 cites·6 claims
- 5036US5489423AProcess for recovering sulfuric acid from metallic sulfate-containing exhaust sulfuric acidNITTETSU MINING CO LTD·Filed 1992·Granted Feb 6, 1996·6 cites·6 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
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