US3018828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of water and gas coning
Assignee: Phillips Petroleum Co
•
Filing: 1957-07-15
•
Granted: 1962-01-30
•
Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Spencer S Prentiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:11
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1423759A
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US1587714A
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US1604763A
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US2326804A
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US2371339A
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US2607426A
Cited
US2560209A
Cited
US2749988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |