Tazuo Ohta
6Patents
5h-index
11Co-inventors
56Inventor score
Filing activity: Dec 5, 1977 → Jun 25, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5132450A | Process for producing high purity isophthalic acid | Chemistry; Metallurgy | 53 | Expired |
| US4268690A | Process for producing terephthalic acid of high purity | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4211882A | Process for producing terephthalic acid | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4297507A | Process and apparatus for producing terephthalic acid with high purity | Chemistry; Metallurgy | 8 | Expired |
| US5189209A | Process for producing highly pure isophthalic acid | Chemistry; Metallurgy | 8 | Expired |
| US4214100A | Process for preventing blackening of phthalic acid | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.