US3380913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of effluent from in situ combustion operation
Assignee: Phillips Petroleum Co
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Filing: 1964-12-28
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Granted: 1968-04-30
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Miles L Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |