Patent US3490531A successfully refreshed from Google Patents.
US3490531A
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Thermal oil stimulation process
Assignee: Phillips Petroleum Co
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Filing: 1968-05-27
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Granted: 1970-01-20
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Expires: 1988-05-27
Abstract
No abstract record available.
Inventors
- 👤 Henry O Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:41
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3171482A
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US3180412A
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US3217800A
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US3332482A
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US3357487A
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US3376929A
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US3394759A
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US3400763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |