Showa Denko K.K.
2,017Patents
1,156Active
2,017Granted
57Portfolio score
Filing activity: Aug 9, 1973 → Jul 11, 2022 · 522 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7250226B2 | Phosphorescent compound, a phosphorescent composition and an organic light-emitting device | Emerging Cross-Sectional Technologies | 819 | Expired |
| US7396598B2 | Light emitting material and organic light-emitting device | Emerging Cross-Sectional Technologies | 806 | Expired |
| US6096456A | Film for a separator of electrochemical apparatus, and production method and use thereof | Emerging Cross-Sectional Technologies | 111 | Expired |
| US5656829A | Semiconductor light emitting diode | Electricity | 105 | Expired |
| US6069021A | Method of growing group III nitride semiconductor crystal layer and semiconductor device incorporating group III nitride semiconductor crystal layer | Electricity | 105 | Expired |
| US6455021B1 | Method for producing carbon nanotubes | Emerging Cross-Sectional Technologies | 95 | Expired |
| US6534044B1 | Cosmetic preparation, surface-hydrophobized silica-coated metal oxide particles, sol of silica-coated metal oxide, and processes for producing these | Chemistry; Metallurgy | 85 | Expired |
| US5166041A | Near infrared ray-decolorizable recording material | Emerging Cross-Sectional Technologies | 84 | Expired |
| US5254338A | External application base or auxiliary agent and external application composition for human being or animal containing the same | Human Necessities | 80 | Expired |
| US6235270A | Cosmetics, silica-coated metal oxide powder and production method therefor | Chemistry; Metallurgy | 72 | Expired |
| US4898781A | Water-soluble microcapsules | Emerging Cross-Sectional Technologies | 72 | Expired |
| US5597661A | Solid polymer electrolyte, battery and solid-state electric double layer capacitor using the same as well as processes for the manufacture thereof | Emerging Cross-Sectional Technologies | 70 | Expired |
| US6027705A | Method for producing a higher silane | Chemistry; Metallurgy | 67 | Expired |
| US5362592A | Decolorizable toner | Physics | 66 | Expired |
| US6368733B1 | ELO semiconductor substrate | Electricity | 63 | Expired |
| US5800577A | Polishing composition for chemical mechanical polishing | Chemistry; Metallurgy | 62 | Expired |
| US8279057B2 | Method of detecting presence of subject on bed | Human Necessities | 57 | Active |
| US5665490A | Solid polymer electrolyte, battery and solid-state electric double layer capacitor using the same as well as processes for the manufacture thereof | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4938940A | Vapor-phase method for synthesis of diamond | Chemistry; Metallurgy | 55 | Expired |
| US4529476A | Gas for selectively etching silicon nitride and process for selectively etching silicon nitride with the gas | Electricity | 52 | Expired |
| US4380600A | Aqueous dispersion of water-soluble polymer composition | Chemistry; Metallurgy | 52 | Expired |
| US5223311A | Laminate and process for producing the same | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4880786A | Additive solution for blood preservation and activation | Human Necessities | 50 | Expired |
| US7329698B2 | Conductive curable resin composition and separator for fuel cell | Emerging Cross-Sectional Technologies | 48 | Expired |
| US3944643A | Method for manufacturing shaped articles by injection-blow molding | Performing Operations; Transporting | 47 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.