US3379259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erosion protection for wells
Assignee: Mobil Oil AS
•
Filing: 1966-03-30
•
Granted: 1968-04-23
•
Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Alvin V Metler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:05
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1085; E21B43/00; E21B43/02; E21B43/08; E21B43/086; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2035313A
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US1397836A
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US1473644A
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US1572022A
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US2044657A
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US2143836A
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US2877852A
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US3282341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |