DENKI KAGAKU KOGYO KABUSHIKI KAISHA
475Patents
146Active
475Granted
47Portfolio score
Filing activity: Aug 21, 1969 → Aug 12, 2015 · 105 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6635267B1 | Hyaluronic acid gel, process for the preparation thereof and medical materials containing the same | Chemistry; Metallurgy | 76 | Expired |
| US4190454A | Cement retarder and rapid hardening cement containing the same | Emerging Cross-Sectional Technologies | 65 | Expired |
| US6387413B1 | Hyaluronic acid gel, a method of its production and medical material containing it | Chemistry; Metallurgy | 50 | Expired |
| US5192366A | Cement admixture and cement composition | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4721878A | Charged particle emission source structure | Electricity | 45 | Expired |
| US5733352A | Honeycomb structure, process for its production, its use and heating apparatus | Emerging Cross-Sectional Technologies | 44 | Expired |
| US5854155A | Hexagonal system boron nitride powder | Chemistry; Metallurgy | 41 | Expired |
| US4510274A | Vinyl acetate-ethylene copolymer emulsion and aqueous emulsion adhesive composition containing the emulsion | Chemistry; Metallurgy | 41 | Expired |
| US6840996B2 | Cement composition | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5858300A | Self-sustaining container | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5354415A | Method for forming a ceramic circuit board | Electricity | 37 | Expired |
| US4404322A | Heat resistant resin composition | Chemistry; Metallurgy | 37 | Expired |
| US4082561A | Method for execution of quick hardening cement | Chemistry; Metallurgy | 36 | Expired |
| US6107411A | Block copolymer, block copolymer composition and heat shrinkable films made thereof | Chemistry; Metallurgy | 35 | Expired |
| US6175084A | Metal-base multilayer circuit substrate having a heat conductive adhesive layer | Electricity | 34 | Expired |
| US6638538B1 | Hyaluronic acid gel composition, process for producing the same, and medical material containing the same | Chemistry; Metallurgy | 34 | Expired |
| US4521476A | Hybrid integrated circuit and preparation thereof | Emerging Cross-Sectional Technologies | 34 | Expired |
| US6559234B1 | Cross-copolymerized olefin/styrene/diene copolymer, process for the production of the same and uses thereof | Chemistry; Metallurgy | 33 | Expired |
| US7014860B1 | Hyaluronic acid gel, process for producing the same, and medical material containing the same | Chemistry; Metallurgy | 32 | Expired |
| US6004299A | Injection vessel and solution-enclosed injection vessel in use thereof | Human Necessities | 32 | Expired |
| US3973978A | Method for execution of quick hardening cement | Chemistry; Metallurgy | 32 | Expired |
| US4933013A | Hydraulic material composition having high strength | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5883213A | Ethylene-aromatic vinyl compound copolymer and method for its production | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4302554A | Film for heat sealing and process of heat sealing | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5132164A | Fluorine resin type weather-resistant film | Emerging Cross-Sectional Technologies | 29 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.