TEIJIN CHEMICALS LIMITED
130Patents
41Active
130Granted
47Portfolio score
Filing activity: May 18, 1976 → Mar 26, 2015 · 29 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5599897A | Aromatic polycarbonate, a method for producing the same, and a plastic optical waveguide using the same | Emerging Cross-Sectional Technologies | 42 | Expired |
| US7241825B2 | Polycarbonate resin composition, pellets thereof and molded article thereof | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5952096A | Spectacle lens | Emerging Cross-Sectional Technologies | 33 | Expired |
| US6362269B1 | Resin composition | Chemistry; Metallurgy | 32 | Expired |
| US5723526A | Resin composition and molded article | Chemistry; Metallurgy | 28 | Expired |
| US8962780B2 | Polycarbonate-polydiorganosiloxane copolymer | Chemistry; Metallurgy | 26 | Active |
| US4474906A | Carbon fiber and resin composition reinforced by the same | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6808804B2 | Sheet-form layered structure with attractive appearance and utilization thereof | Emerging Cross-Sectional Technologies | 24 | Expired |
| US7148313B2 | Polycarbonate resin composition and molded articles thereof | Chemistry; Metallurgy | 22 | Expired |
| US6780917B2 | Aromatic polycarbonate resin composition | Chemistry; Metallurgy | 20 | Expired |
| US5494171A | Method and apparatus for removing fine particles from synthetic resin pellets | Performing Operations; Transporting | 19 | Expired |
| US5998674A | Bromine compound production method | Chemistry; Metallurgy | 19 | Expired |
| US5463013A | Modified aromatic polycarbonate resin, modified aromatic polyester carbonate resin, modified polyarylate, and molded articles therefrom | Chemistry; Metallurgy | 19 | Expired |
| US4670479A | Polycarbonate resin composition useful in optical applications | Chemistry; Metallurgy | 18 | Expired |
| US6403683B1 | Polycarbonate resin composition and molded article | Chemistry; Metallurgy | 17 | Expired |
| US6727303B2 | Flame retardant aromatic polycarbonate resin composition and molded articles thereof | Chemistry; Metallurgy | 17 | Expired |
| US7750057B2 | Method for obtaining alkali metal salt aqueous solution of aromatic dihydroxy compound from waste aromatic polycarbonate | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6355767B1 | Aromatic polycarbonate resin composition | Chemistry; Metallurgy | 14 | Expired |
| US6616868B1 | Injection compression molding method for optically formed product | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4978181A | Sunshade | Fixed Constructions | 14 | Expired |
| US4762873A | Polycarbonate resin composition | Chemistry; Metallurgy | 14 | Expired |
| US7939591B2 | Polycarbonate resin composition | Chemistry; Metallurgy | 13 | Active |
| US6846567B1 | Surface-protected transparent plastic composite | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6956073B2 | Flame-retardant resin composition | Chemistry; Metallurgy | 12 | Expired |
| US5691798A | Progressive power ophthalmic lens | Physics | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.