US2612759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submergible drilling barge
Assignee: Individual
•
Filing: 1949-09-17
•
Granted: 1952-10-07
•
Expires: 1969-09-17
Abstract
No abstract record available.
Inventors
- 👤 John T Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:37
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027; E02B2017/0039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306322A
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US712002A
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US720998A
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US1341289A
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US1346743A
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US1681533A
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US2200661A
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US2334992A
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US2551375A
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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) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |