Akio Ejima
13Patents
7h-index
11Co-inventors
59Inventor score
Filing activity: Apr 17, 1985 → Jan 24, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5834476A | Hexa-cyclic compound | Chemistry; Metallurgy | 40 | Expired |
| US4939255A | Hexa-cyclic camptothecin derivatives | Chemistry; Metallurgy | 26 | Expired |
| US4778891A | Certain pyrano (3,4-f)-indolizine derivatives | Chemistry; Metallurgy | 24 | Expired |
| US5061795A | Hexa-cyclic compound | Chemistry; Metallurgy | 22 | Expired |
| US6169086A | Pyrazole derivatives | Chemistry; Metallurgy | 13 | Expired |
| US5658920A | Substituted 1H,12H-benz-[DE]pyrano[3',4':6,7] indolizino[1,2-B]quinoline-10,13(9H,15H)-dione compound | Chemistry; Metallurgy | 11 | Expired |
| US5852019A | Pyrimidinylpyrazole derivatives | Human Necessities | 8 | Expired |
| US5637770A | Hexa-cyclic compound | Chemistry; Metallurgy | 5 | Expired |
| US5770605A | Method for treating leukemia with a hexa-cyclic compound | Chemistry; Metallurgy | 4 | Expired |
| US6407115B1 | Hexa-cyclic compound | Chemistry; Metallurgy | 2 | Expired |
| US6573377B1 | Pyrazole derivatives and salts thereof | Chemistry; Metallurgy | 1 | Expired |
| US6552018B1 | Pyrazole derivatives | Chemistry; Metallurgy | 1 | Expired |
| US4833242A | Cephalosporin derivatives and salts thereof | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.