US2991749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil structures
Assignee: Individual
•
Filing: 1959-12-29
•
Granted: 1961-07-11
•
Expires: 1979-12-29
Abstract
No abstract record available.
Inventors
- 👤 George W Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:19
CPC Classifications
B; B63; B63B; B63B41/00; B63H; B63H25/00; B63H25/06; B63H25/38; B63H25/382; B63H2025/384; B63H2025/385
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |