Richard E. Dilgren
9Patents
7h-index
6Co-inventors
48Inventor score
Filing activity: May 27, 1977 → Mar 18, 1985
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4643256A | Steam-foaming surfactant mixtures which are tolerant of divalent ions | Chemistry; Metallurgy | 73 | Expired |
| US4393937A | Olefin sulfonate-improved steam foam drive | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4086964A | Steam-channel-expanding steam foam drive | Fixed Constructions | 41 | Expired |
| US4488976A | Olefin sulfonate-improved steam foam drive | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4532993A | Selective steam foam soak oil recovery process | Fixed Constructions | 29 | Expired |
| US4161217A | Hot water foam oil production process | Chemistry; Metallurgy | 18 | Expired |
| US4597442A | Reservoir preflushing process for increasing the rate of surfactant transport in displacing oil with injected steam and steam-foaming surfactant | Fixed Constructions | 12 | Expired |
| US4601336A | Process for selecting a steam foam forming surfactant | Fixed Constructions | 7 | Expired |
| US4562727A | Olefin sulfonate-improved steam foam drive | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.