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.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →