TODA KOGYO CORP.
393Patents
119Active
393Granted
47Portfolio score
Filing activity: Dec 23, 1974 → Oct 13, 2023 · 44 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6099957A | Plate-like ferrite particles with magnetoplumbite structure and magnetic card using the same | Emerging Cross-Sectional Technologies | 112 | Expired |
| US5123989A | Resin-bonding method | Performing Operations; Transporting | 61 | Expired |
| US5336421A | Spinel-type spherical, black iron oxide particles and process for the producing the same | Chemistry; Metallurgy | 51 | Expired |
| US6428766B1 | Manganese oxide, lithium manganese complex oxide and cobalt-coated lithium manganese complex oxide, and preparation processes thereof | Emerging Cross-Sectional Technologies | 47 | Expired |
| US6436520B1 | Magnetic display device | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4133677A | Process for producing acicular magnetic metallic particle powder | Electricity | 39 | Expired |
| US5686012A | Modified particles | Emerging Cross-Sectional Technologies | 36 | Expired |
| US6312795A | Magnetic sheet | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5112403A | Coating composition | Chemistry; Metallurgy | 25 | Expired |
| US5599627A | Magnetic particles comprising magnetite core and process for producing the same | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5645652A | Spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients and process for producing the same | Emerging Cross-Sectional Technologies | 24 | Expired |
| US7022752B2 | Composite particles, process for producing the same, and pigment, paint and resin composition using the same | Chemistry; Metallurgy | 23 | Expired |
| US6280536A | Fe based hard magnetic alloy having super-cooled liquid region | Electricity | 23 | Expired |
| US3970738A | Process for producing iron oxide products from waste liquids containing ferrous salts | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5750250A | Hematite particles and magnetic recording medium having a non-magnetic under-coat layer containing hematite (Fe.sub.2 O.sub.3) particles. | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6800684B2 | Composite particles, and tread rubber composition, paint and resin composition using the same | Chemistry; Metallurgy | 21 | Expired |
| US5531922A | Granulated particles for magnetic particles for magnetic recording, and process for producing the same | Electricity | 20 | Expired |
| US9698420B2 | Li-Ni composite oxide particles and process for producing the same, and non-aqueous electrolyte secondary battery | Emerging Cross-Sectional Technologies | 20 | Active |
| US6677105B2 | Self-lubricating layer for data storage devices | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4917952A | Electroconductive iron oxide particles | Emerging Cross-Sectional Technologies | 20 | Expired |
| US9505631B2 | Positive electrode active material for secondary batteries with nonaqueous electrolytic solution, process for the production of the active material, and secondary batteries with nonaqueous electrolytic solution | Emerging Cross-Sectional Technologies | 20 | Active |
| US8066913B2 | Li-Ni composite oxide particles for non-aqueous electrolyte secondary cell, process for producing the same, and non-aqueous electrolyte secondary cell | Emerging Cross-Sectional Technologies | 20 | Active |
| US5389482A | Magnetic particle powder included in magnetic toners for magnetic image character recognition | Electricity | 19 | Expired |
| US5587232A | Non-magnetic particles for non-magnetic undercoating layer of magnetic recording medium, non-magnetic undercoating layer containing the same, and magnetic recording medium having the undercoating layer | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4136158A | Production of acicular magnetic iron oxides | Chemistry; Metallurgy | 19 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.