Hiroshi Umezawa
15Patents
4h-index
18Co-inventors
57Inventor score
Filing activity: Dec 21, 1987 → Jul 29, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5583244A | Siloxane-containing pullulan and method for the preparation thereof | Chemistry; Metallurgy | 14 | Expired |
| US6525192B2 | Low-substituted hydroxypropyl cellulose and process for producing same | Chemistry; Metallurgy | 5 | Expired |
| US8017766B2 | Methods for preparing alkali cellulose and cellulose ether | Chemistry; Metallurgy | 5 | Active |
| US6602995B2 | Method for the formation of low-substituted hydroxypropyl cellulose particles | Chemistry; Metallurgy | 4 | Expired |
| US8343548B2 | Solid dosage form comprising solid dispersion | Human Necessities | 3 | Active |
| US8519120B2 | Methods for producing a low-substituted hydroxypropylcellulose powder | Emerging Cross-Sectional Technologies | 3 | Active |
| US9534061B2 | Methods for preparing alkali cellulose and cellulose ether | Chemistry; Metallurgy | 1 | Active |
| US4894457A | 7-bromo-beta-carboline compound and method for producing same | Chemistry; Metallurgy | 1 | Expired |
| US8853388B2 | Methods for preparing alkali cellulose and cellulose ether | Chemistry; Metallurgy | 1 | Active |
| US9068021B2 | Low-substituted hydroxypropylcellulose powder | Emerging Cross-Sectional Technologies | 1 | Active |
| US7009046B2 | Low-substituted hydroxypropyl cellulose and agent serving both as binder and disintegrant for dry direct compression | Chemistry; Metallurgy | 0 | Expired |
| US8343547B2 | Solid dosage form comprising solid dispersion | Human Necessities | 0 | Active |
| US9611333B2 | Methods for preparing alkali cellulose and cellulose ether | Chemistry; Metallurgy | 0 | Active |
| US8865889B2 | Methods for preparing alkali cellulose and cellulose ether | Chemistry; Metallurgy | 0 | Active |
| US9617350B2 | Methods for preparing alkali cellulose and cellulose ether | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.