Mitsubishi Gas Chemical Company, Inc.
2,272Patents
1,045Active
2,272Granted
55Portfolio score
Filing activity: Feb 16, 1973 → Feb 14, 2024 · 245 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5242879A | Active carbon materials, process for the preparation thereof and the use thereof | Chemistry; Metallurgy | 140 | Expired |
| US5116547A | Method of coloring polycarbonate extruded or molded products for optical members | Chemistry; Metallurgy | 129 | Expired |
| US6280641A | Printed wiring board having highly reliably via hole and process for forming via hole | Emerging Cross-Sectional Technologies | 127 | Expired |
| US5972862A | Cleaning liquid for semiconductor devices | Electricity | 124 | Expired |
| US4192773A | Oxygen absorbent | Human Necessities | 109 | Expired |
| US4769175A | Sheet-like, oxygen-scavenging agent | Performing Operations; Transporting | 95 | Expired |
| US4978778A | Process for producing vinyl acetate | Chemistry; Metallurgy | 93 | Expired |
| US4110364A | Curable resin compositions of cyanate esters | Chemistry; Metallurgy | 89 | Expired |
| US5286407A | Oxygen absorbent composition and method of preserving article with same | Mechanical Engineering; Lighting; Heating | 88 | Expired |
| US6222031A | Process for preparing water-soluble tricarboxypolysaccharide | Chemistry; Metallurgy | 84 | Expired |
| US6097089A | Semiconductor plastic package, metal plate for said package, and method of producing copper-clad board for said package | Electricity | 80 | Expired |
| US6052500A | Optical waveguide device for connections without optical axis adjustment | Physics | 79 | Expired |
| US6117923A | Resin for optical material | Physics | 79 | Expired |
| US4579223A | Oxygen absorbent packet | Emerging Cross-Sectional Technologies | 79 | Expired |
| US4816308A | Multilayered container | Emerging Cross-Sectional Technologies | 79 | Expired |
| US5241149A | Food packing body for heat and microwave treatment | Emerging Cross-Sectional Technologies | 75 | Expired |
| US4366179A | Oxygen and carbon dioxide absorbent and process for storing coffee by using the same | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5705089A | Cleaning fluid for semiconductor substrate | Chemistry; Metallurgy | 74 | Expired |
| US5807975A | Alkyl sulfide type episulfide compound | Physics | 74 | Expired |
| US4127503A | Oxygen absorbent | Performing Operations; Transporting | 73 | Expired |
| US4166807A | Oxygen absorbent | Performing Operations; Transporting | 73 | Expired |
| US5382333A | Process for producing copper clad laminate | Electricity | 72 | Expired |
| US5770765A | Process for the production of high-purity isophthalic acid | Chemistry; Metallurgy | 71 | Expired |
| US4287995A | Container sealing member with oxygen absorbent | Performing Operations; Transporting | 67 | Expired |
| US5051309A | Anti-dazzling polycarbonate polarizing plate | Emerging Cross-Sectional Technologies | 67 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.