SHOWA DENKO
401Patents
2Active
401Granted
42Portfolio score
Filing activity: Mar 21, 1973 → May 20, 2009 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4994515A | Heat-resistant resin composition | Chemistry; Metallurgy | 134 | Expired |
| US4252544A | Alumina abrasive grains and method for manufacturing the same | Chemistry; Metallurgy | 129 | Expired |
| US4954141A | Polishing pad for semiconductor wafers | Emerging Cross-Sectional Technologies | 128 | Expired |
| US6153894A | Group-III nitride semiconductor light-emitting device | Electricity | 114 | Expired |
| US4816286A | Process for synthesis of diamond by CVD | Chemistry; Metallurgy | 101 | Expired |
| US4966809A | Water-absorbing composite body | Emerging Cross-Sectional Technologies | 83 | Expired |
| US4778593A | Method and apparatus for discriminating minute particles | Physics | 73 | Expired |
| US4751146A | Printed circuit boards | Emerging Cross-Sectional Technologies | 70 | Expired |
| US6787814B2 | Group-III nitride semiconductor light-emitting device and production method thereof | Electricity | 68 | Expired |
| US6115235A | Capacitor | Electricity | 62 | Expired |
| US4157728A | Process for direct chill casting of metals | Performing Operations; Transporting | 59 | Expired |
| US4954512A | Anti-ulcer composition | Chemistry; Metallurgy | 55 | Expired |
| US4933106A | Highly conductive polymer composition and process for producing the same | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4351922A | Process for the production of highly water-absorbing but less water-soluble hydrogels | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4842863A | Granular agent for ruminant and production method thereof | Human Necessities | 47 | Expired |
| US4929479A | Medical bag | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4902649A | Hard tissue substitute composition | Human Necessities | 46 | Expired |
| US4650287A | Laser-light shield and method for shielding human body from laser light | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4634784A | Process for production of epichlorohydrin | Chemistry; Metallurgy | 45 | Expired |
| US4567366A | Method and apparatus for measuring methane concentration in gas | Physics | 44 | Expired |
| US6190805A | Polymerizable compound, solid polymer electrolyte using the same and use thereof | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4518756A | Biphenyloxy mono- and dimethacrylate polymerizable compositions | Chemistry; Metallurgy | 39 | Expired |
| US4547257A | Method for growing diamond crystals | Performing Operations; Transporting | 39 | Expired |
| US4772496A | Molded product having printed circuit board | Emerging Cross-Sectional Technologies | 38 | Expired |
| US3989649A | Process for production of spherical porous fillers for liquid chromatography by suspension polymerization of monovinyl and polyvinyl aromatic monomers in the presence of paraffin wax | Performing Operations; Transporting | 37 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.