US2804038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sailing vessels
Assignee: NAT RES DEV
•
Filing: 1954-01-19
•
Granted: 1957-08-27
•
Expires: 1974-01-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh M Barkla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/06; B63H9/061; B63B; B63B1/00; B63B1/16; B63B1/18; B63B1/02; B63B1/10; B63B1/14; B63B2001/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303839A
Cited
DE403416C
Cited
US1422542A
Cited
GB198649A
Cited
US1753399A
Cited
GB559619A
Cited
GB568209A
Cited
US2484687A
Cited
US2491541A
Cited
DE861518C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |