Ryuji Sotoaka
8Patents
4h-index
28Co-inventors
53Inventor score
Filing activity: Jul 28, 1997 → Apr 24, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5972862A | Cleaning liquid for semiconductor devices | Electricity | 124 | Expired |
| US6265309A | Cleaning agent for use in producing semiconductor devices and process for producing semiconductor devices using the same | Emerging Cross-Sectional Technologies | 28 | Expired |
| US6514352B2 | Cleaning method using an oxidizing agent, chelating agent and fluorine compound | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6843981B1 | Tooth bleaching compositions and methods of bleaching discolored tooth | Human Necessities | 13 | Expired |
| US6875288B2 | Cleaning agent and cleaning method | Chemistry; Metallurgy | 3 | Expired |
| US8883652B2 | Silicon etching liquid and etching method | Performing Operations; Transporting | 1 | Active |
| US8562855B2 | Silicon etching liquid and etching method | Electricity | 0 | Active |
| US7892404B2 | Method for oxidizing substance and oxidation apparatus therefor | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.