Patent US2993462A successfully refreshed from Google Patents.
US2993462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet tunnel boat
Assignee: Individual
•
Filing: 1959-06-25
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Granted: 1961-07-25
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Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 Park E Gough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:41
CPC Classifications
B; B63; B63H; B63H19/00; B63H19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US624271A
Cited
US1222674A
Cited
US1656411A
Cited
US2005473A
Cited
US1986064A
Cited
US2483663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |