Keizo Maruyama
3Patents
3h-index
4Co-inventors
36Inventor score
Filing activity: Nov 28, 1979 → Aug 29, 1983
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4481304A | Catalyst for producing phthalic anhydride | Performing Operations; Transporting | 20 | Expired |
| US4418045A | Method for disposal of waste gas and apparatus therefor | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4284571A | Process for producing phthalic anhydride and catalyst therefor | Performing Operations; Transporting | 16 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.