Patent US2998793A successfully refreshed from Google Patents.
US2998793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible barges
Assignee: Dracone Developments Ltd
•
Filing: 1958-09-10
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Granted: 1961-09-05
•
Expires: 1978-09-10
Abstract
No abstract record available.
Inventors
- 👤 Hawthorne William Rede
- 👤 Shaw John Christopher Shuldham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:24
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/28; B63B35/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US6299A
Cited
US1096192A
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US1301738A
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US1449274A
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DE458506C
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US2371404A
Cited
US2359366A
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US2391926A
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US2492699A
Cited
US2785646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |