John Lindley Leng
9Patents
6h-index
9Co-inventors
56Inventor score
Filing activity: May 7, 1973 → Jul 24, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3935183A | Indazole-azo phenyl compounds | Chemistry; Metallurgy | 33 | Expired |
| US3996221A | Dyestuffs | Chemistry; Metallurgy | 26 | Expired |
| US4978788A | Composition and use of the composition for the extraction of metals from aqueous solution | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5176843A | Composition and use of the composition for the extraction of metals from aqueous solution | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5281336A | Composition and use of the composition for the extraction of metals from aqueous solution | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6113804A | Composition and use of the composition for the extraction of metals from aqueous solution | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4002604A | Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure fused to a thiazole ring | Chemistry; Metallurgy | 5 | Expired |
| US6277300A | Composition and use of composition for the extraction of metal values | Emerging Cross-Sectional Technologies | 2 | Expired |
| US3956265A | Monoazo hydroxy pyridone dyestuffs containing a methylene piperidino group | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.