US3421579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater completion
Assignee: Mobil Oil AS
•
Filing: 1965-06-17
•
Granted: 1969-01-14
•
Expires: 1985-06-17
Abstract
No abstract record available.
Inventors
- 👤 William F Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:25
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/06; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/037; E21B33/0375
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB160865A
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US1948934A
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US2190330A
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US2534480A
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US2667751A
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US2747840A
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US2783970A
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US2854215A
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US3004602A
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US2906500A
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US3294185A
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US3353364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |