US3434542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterflood process employing surfactant and graded viscosity
Assignee: Mobil Oil AS
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Filing: 1967-10-09
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Granted: 1969-03-25
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Billy J Dotson
- 👤 Carl Connally Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:17
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3305016A
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US3199586A
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US3258071A
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US3288213A
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US3366174A
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US3302713A
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US3373808A
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US3361313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |