NITTETSU MINING CO., LTD.
53Patents
5Active
53Granted
40Portfolio score
Filing activity: Feb 20, 1975 → Apr 8, 2020 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5985466A | Powder having multilayered film on its surface and process for preparing the same | Emerging Cross-Sectional Technologies | 72 | Expired |
| US5264030A | Filler for degradable plastics and process for producing the same | Chemistry; Metallurgy | 54 | Expired |
| US5763085A | Powder having at least one layer and process for preparing the same | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5558689A | Reinforced filter element | Performing Operations; Transporting | 29 | Expired |
| US5607490A | Filter having chemical resistance, antistatic property and water vapor resistance, and process for producing the same | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6666991B1 | Fluorescent or phosphorescent composition | Emerging Cross-Sectional Technologies | 24 | Expired |
| US9255011B2 | Method for producing lithium carbonate | Chemistry; Metallurgy | 22 | Active |
| US6987868B1 | Genuine/counterfeit discriminating method, genuine/counterfeit discrimination object, and genuine/counterfeit discriminating device | Physics | 19 | Expired |
| US6207280A | Multilayer-coated powder and process for producing the same | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6337061B1 | Method for reclaiming metal sulfate-containing waste sulfuric acid | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6280658A | Rheological fluid | Chemistry; Metallurgy | 16 | Expired |
| US5935608A | Antibacterial titania and process for producing the same | Human Necessities | 14 | Expired |
| US4347124A | Method and device of separating materials of different density by ferromagnetic liquid | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6261691A | Powder coated with multilayer coating | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6818297B1 | White powder and method for production thereof | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6440322B1 | Magnetic fluid and process for the production thereof | Electricity | 10 | Expired |
| US5507967A | Electrorheological magnetic fluid and process for producing the same | Electricity | 9 | Expired |
| US5080847A | Manufacturing method of filter element for dust collector | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6159396A | Electrorheological magnetic fluid and process for producing the same | Electricity | 8 | Expired |
| US5088651A | Roll crusher and crushing method in use for the roll crusher | Physics | 8 | Expired |
| US6162469A | Medical powder | Human Necessities | 7 | Expired |
| US6310118A | Coloring material composition | Chemistry; Metallurgy | 7 | Expired |
| US7060127B2 | Silica-calcium carbonate composite particles | Textiles; Paper | 6 | Expired |
| US4383890A | Ceramic sheet and method for producing the same | Emerging Cross-Sectional Technologies | 6 | Expired |
| US3969484A | Process for recovering tungsten from alkaline leaching solution of tungsten ores | Chemistry; Metallurgy | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.