TOSOH CORPORATION
899Patents
300Active
899Granted
50Portfolio score
Filing activity: Feb 1, 1983 → Mar 6, 2024 · 87 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5576259A | Process for producing .alpha.-olefin polymer | Emerging Cross-Sectional Technologies | 351 | Expired |
| US5807938A | Catalyst for olefin polymerization and process for producing olefin polymers | Emerging Cross-Sectional Technologies | 300 | Expired |
| US5735590A | Backlighting device with a transparent sheet having straight ridges | Physics | 137 | Expired |
| US6461570B2 | Analyzer | Emerging Cross-Sectional Technologies | 119 | Expired |
| US6144448A | Fluorescence detecting apparatus | Emerging Cross-Sectional Technologies | 108 | Expired |
| US5434116A | Organic transition metal compound having .pi.-bonding heterocyclic ligand and method of polymerizing olefin by using the same | Chemistry; Metallurgy | 99 | Expired |
| US5270024A | Process for reducing nitrogen oxides from exhaust gas | Emerging Cross-Sectional Technologies | 99 | Expired |
| US5521797A | Backlighting device | Emerging Cross-Sectional Technologies | 98 | Expired |
| US5262928A | Back lighting device | Physics | 95 | Expired |
| US5093765A | Back lighting device for a panel | Physics | 84 | Expired |
| US5194333A | Packing material for reversed phase chromatography and process for its preparation | Emerging Cross-Sectional Technologies | 83 | Expired |
| US5882594A | Device and method for automatic sample pretreatment | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5442523A | Backlighting device | Physics | 73 | Expired |
| US5814447A | Method of detecting specific nucleic acid sequences | Chemistry; Metallurgy | 72 | Expired |
| US5843376A | Reaction apparatus for automatic analysis | Emerging Cross-Sectional Technologies | 71 | Expired |
| US5861315A | Use of stem cell factor and soluble interleukin-6 receptor for the ex vivo expansion of hematopoietic multipotential cells | Chemistry; Metallurgy | 71 | Expired |
| US6541205B1 | Method for assaying nucleic acid | Chemistry; Metallurgy | 67 | Expired |
| US4944922A | Quantitative dispenser for a liquid | Emerging Cross-Sectional Technologies | 65 | Expired |
| US5178834A | Automatic immunoassay analyzer | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5866689A | Monoclonal antibodies to GP130 protein | Chemistry; Metallurgy | 55 | Expired |
| US6605735B2 | Ruthenium complex, process for producing the same and process for producing thin film | Chemistry; Metallurgy | 55 | Expired |
| US4937709A | Back lighting device for a liquid crystal panel | Physics | 51 | Expired |
| US5736106A | Thermal cycling reaction apparatus and reactor therefor | Performing Operations; Transporting | 49 | Expired |
| US6034187A | Catalyst for olefin polymerization and process for production of olefin polymer | Chemistry; Metallurgy | 46 | Expired |
| US5618095A | Backlighting device | Mechanical Engineering; Lighting; Heating | 44 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.