US3001592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling and servicing barge including bridge and rig structure and methods
Assignee: De Long Corp
•
Filing: 1954-09-03
•
Granted: 1961-09-26
•
Expires: 1974-09-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:21
CPC Classifications
E; E21; E21B; E21B15/00; E21B15/02; E02; E02B; E02B17/00; E02B17/02; E02B17/021; E02B2017/0056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US630879A
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US1840339A
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US1856312A
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US1946579A
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US2237387A
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US2334303A
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US2475933A
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US2515540A
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US2602636A
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US2653796A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |