Ryuichi Imai
11Patents
4h-index
18Co-inventors
53Inventor score
Filing activity: Apr 5, 2005 → Nov 2, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7866706B2 | Threaded joint for steel pipe | Chemistry; Metallurgy | 11 | Active |
| US7770935B2 | Threaded joint for steel pipes | Chemistry; Metallurgy | 8 | Active |
| US7883118B2 | Threaded joint for steel pipes | Emerging Cross-Sectional Technologies | 6 | Active |
| US8420581B2 | Threaded joint for pipes having a lubricating coating | Chemistry; Metallurgy | 4 | Active |
| US9321982B2 | Threaded joint for pipes | Chemistry; Metallurgy | 4 | Active |
| US8586644B2 | Photocurable composition suitable for rust prevention of a threaded joint for steel pipes | Emerging Cross-Sectional Technologies | 3 | Active |
| US8276946B2 | Threaded joint for steel tubes | Chemistry; Metallurgy | 2 | Active |
| US7066209B2 | Thread protector | Performing Operations; Transporting | 1 | Expired |
| US8409718B2 | Threaded joint for steel pipes | Emerging Cross-Sectional Technologies | 1 | Active |
| US10626345B2 | Threaded joint for pipes | Chemistry; Metallurgy | 0 | Active |
| US8741406B2 | Oil well pipe with threaded joint | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.