US2653452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deepwater submersible barge
Assignee: Individual
•
Filing: 1949-04-06
•
Granted: 1953-09-29
•
Expires: 1969-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert A J Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:13
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US123402A
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US210185A
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US256608A
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US1316357A
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US1334445A
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US1681533A
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US1927952A
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US2248051A
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US2327118A
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US2422168A
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US2528089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |