US2722189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Craft adapted to travel on water
Assignee: Individual
•
Filing: 1948-10-29
•
Granted: 1955-11-01
•
Expires: 1968-10-29
Abstract
No abstract record available.
Inventors
- 👤 Hobday Stephen William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US857951A
Cited
US1186816A
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US1475869A
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US1634257A
Cited
US2176469A
Cited
US2457393A
Cited
US2387907A
Cited
US2400782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |