US2699321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deepwater oil drilling and storage craft
Assignee: Individual
•
Filing: 1949-06-21
•
Granted: 1955-01-11
•
Expires: 1969-06-21
Abstract
No abstract record available.
Inventors
- 👤 Fred N Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/043; E02; E02B; E02B17/00; E02B17/02; E02B17/021; E21B15/00; E21B15/02; E21B7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US307861A
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US480127A
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US616567A
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US676993A
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US819317A
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US873069A
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US1048194A
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DE516047C
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DE670470C
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US2171672A
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US2248051A
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US2308743A
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US2429952A
Cited
US2503516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |