Patent US3424253A successfully refreshed from Google Patents.
US3424253A
Expired / Lapsed
US
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Method for drilling and working in offshore wells
Assignee: Chevron USA Inc
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Filing: 1956-12-03
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Granted: 1969-01-28
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Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 William C Triplett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:02
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/01; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/05; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE24083E
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US1173355A
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US1853379A
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US2187871A
Cited
US2512783A
Cited
US2669431A
Cited
US2676787A
Cited
US2808229A
Cited
US2891770A
Cited
US2808230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |