TOHO TITANIUM CO., LTD.
135Patents
65Active
135Granted
51Portfolio score
Filing activity: May 9, 1977 → Apr 7, 2022 · 10 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4816433A | Solid catalyst component for the polymerization of olefins and an olefin polymerization catalyst | Chemistry; Metallurgy | 100 | Expired |
| US6918942B2 | Process for production of titanium alloy | Chemistry; Metallurgy | 71 | Expired |
| US4829037A | Catalyst for polymerization of olefins | Emerging Cross-Sectional Technologies | 69 | Expired |
| US4957819A | Frameless and coreless porous endosseous implant | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4842517A | Endosseous implant having mesh pore structure | Human Necessities | 57 | Expired |
| US4460701A | Process for the preparation of catalyst component for the polymerization of olefins | Chemistry; Metallurgy | 56 | Expired |
| US6670497B2 | Phthalic diester derivatives and electron donors | Chemistry; Metallurgy | 53 | Expired |
| US4547476A | Catalyst component for the polymerization of olefins and catalyst therefor | Chemistry; Metallurgy | 51 | Expired |
| US5498770A | Catalyst for the polymerization of olefins and process for the polymerization of olefins | Chemistry; Metallurgy | 51 | Expired |
| US4562173A | Catalyst component for the polymerization of olefins and catalyst therefor | Chemistry; Metallurgy | 50 | Expired |
| US6475673B1 | Process for producing lithium titanate and lithium ion battery and negative electrode therein | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5684173A | Organosilicon compound and ziegler-natta catalyst containing the same | Chemistry; Metallurgy | 44 | Expired |
| US5965478A | Solid catalyst component and catalyst for polymerization of olefins | Chemistry; Metallurgy | 38 | Expired |
| US4970186A | Solid catalyst component for the polymerization of olefins and an olefin polymerization catalyst | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5130284A | Sold catalyst component for the polymerization of olefins and an olefin polymerization catalyst | Chemistry; Metallurgy | 34 | Expired |
| US4877445A | Method for producing a metal from its halide | Chemistry; Metallurgy | 31 | Expired |
| US4847227A | Solid catalyst component for olefin polymerization catalysts | Chemistry; Metallurgy | 30 | Expired |
| US4964801A | Endosseous implant having polycapillary structure | Human Necessities | 28 | Expired |
| US4902341A | Method for producing titanium alloy | Chemistry; Metallurgy | 25 | Expired |
| US10442000B2 | Titanium-based powder, and ingot and sintered article thereof | Emerging Cross-Sectional Technologies | 22 | Active |
| US6156690A | Solid catalyst component and catalyst for polymerization of olefins | Chemistry; Metallurgy | 21 | Expired |
| US6770586B2 | Solid catalyst component and catalyst for olefins polymerization | Chemistry; Metallurgy | 21 | Expired |
| US5945366A | Solid catalyst component for polymerization of olefins and catalyst | Chemistry; Metallurgy | 20 | Expired |
| US6645673B2 | Process for producing lithium titanate and lithium ion battery and negative electrode therein | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6352681B1 | Method for producing barium titanate powder | Chemistry; Metallurgy | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.