Patent US2998792A successfully refreshed from Google Patents.
US2998792A
Expired / Lapsed
US
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Waterborne vehicles
Assignee: Dracone Developments Ltd
•
Filing: 1959-05-04
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Granted: 1961-09-05
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Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Hasler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:12
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B35/00; B63B35/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301738A
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US1776700A
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US1976046A
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US2257406A
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US2274200A
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US2391926A
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US2649266A
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FR1154146A
Cited
FR1159028A
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 |