Yasutaka Sumida
11Patents
4h-index
24Co-inventors
56Inventor score
Filing activity: Oct 18, 1995 → Sep 25, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6103686A | Chelating composition | Chemistry; Metallurgy | 17 | Expired |
| US6743748B2 | Catalyst for producing epoxy compounds and method of producing epoxy compounds using the same | Performing Operations; Transporting | 14 | Expired |
| US6294693A | Production process for ether carboxylate salt | Chemistry; Metallurgy | 9 | Expired |
| US6063302A | Method for handling iminocarboxylic acid salt | Chemistry; Metallurgy | 4 | Expired |
| US5801277A | Solid catalyst for etherification reaction and production process for ether compound using this catalyst | Chemistry; Metallurgy | 3 | Expired |
| US8173588B2 | Iminocarboxylic acid salt-containing solid composition and production method thereof | Chemistry; Metallurgy | 2 | Active |
| US7425519B2 | Liquid phase oxygenation reaction using tungsten species | Performing Operations; Transporting | 1 | Expired |
| US6506932B2 | Method for production of oxygen-containing aromatic compound | Performing Operations; Transporting | 1 | Expired |
| US7319165B2 | Aminopolycarboxylic acid aqueous solution composition and stabilization method of aminopolycarboxlic acid | Chemistry; Metallurgy | 0 | Expired |
| US10566618B2 | Cell | Emerging Cross-Sectional Technologies | 0 | Active |
| US6504054B1 | Amino acid derivative and producing method thereof | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.