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US2890671A
Expired / Lapsed
US
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Hydrofoil watercraft
Assignee: Individual
•
Filing: 1955-06-27
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Granted: 1959-06-16
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Hobday Stephen William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:31
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285; B63B1/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1965147A
Cited
US1924032A
Cited
US2333688A
Cited
US2550220A
Cited
GB587317A
Cited
US2709979A
Cited
US2696796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |