Keiichi Narita
42Patents
6h-index
76Co-inventors
72Inventor score
Filing activity: Jul 3, 2003 → Sep 16, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US10159934B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 16 | Active |
| US7205257B2 | Catalyst for clarifying exhaust gas | Emerging Cross-Sectional Technologies | 15 | Expired |
| US8361925B2 | Exhaust gas-purifying catalyst | Performing Operations; Transporting | 15 | Active |
| US8318632B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 13 | Active |
| US8975204B2 | Exhaust-gas-purifying catalyst | Emerging Cross-Sectional Technologies | 12 | Active |
| US7976887B2 | Method of extracting volatile component from tasty material, the volatile component and foods and drinks containing the volatile component | Human Necessities | 8 | Active |
| US7446070B2 | Exhaust gas-purifying catalyst | Emerging Cross-Sectional Technologies | 6 | Active |
| US7622418B2 | Method for producing exhaust gas purifying catalyst | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7795170B2 | Catalyst | Performing Operations; Transporting | 5 | Active |
| US8569198B2 | Exhaust gas-purifying catalyst | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US10307736B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 5 | Active |
| US9849443B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 4 | Active |
| US8158552B2 | Exhaust gas purifying catalyst | Emerging Cross-Sectional Technologies | 4 | Active |
| US7601325B2 | Perovskite-type composite oxide, catalyst composition and method for producing perovskite-type composite oxide | Emerging Cross-Sectional Technologies | 4 | Expired |
| US10112181B2 | Catalyst for purification of exhaust gas, method for producing the same, and method for purification of exhaust gas using the same | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US10731532B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 3 | Active |
| US7956005B2 | Exhaust gas-purifying catalyst | Emerging Cross-Sectional Technologies | 3 | Active |
| US8187996B2 | Exhaust gas-purifying catalyst | Emerging Cross-Sectional Technologies | 3 | Active |
| US11224840B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 2 | Active |
| US10011802B2 | Lubricating oil composition | Chemistry; Metallurgy | 2 | Active |
| US10323554B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 2 | Active |
| US8993475B2 | Oxygen storage material | Emerging Cross-Sectional Technologies | 2 | Active |
| US9506010B2 | Lubricant composition and continuously-variable transmission | Chemistry; Metallurgy | 2 | Active |
| US8133839B2 | Exhaust gas-purifying catalyst | Emerging Cross-Sectional Technologies | 1 | Active |
| US8598100B2 | Lubricating oil additive and lubricating oil composition | Chemistry; Metallurgy | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.