US2997974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat hull
Assignee: Individual
•
Filing: 1959-09-22
•
Granted: 1961-08-29
•
Expires: 1979-09-22
Abstract
No abstract record available.
Inventors
- 👤 Hamlin Cyrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:45
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B3/00; B63B3/14; B63B3/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189819007A
Cited
US987059A
Cited
US1709219A
Cited
GB571365A
Cited
US2477425A
Cited
US2855885A
Cited
FR1169344A
Cited
FR1169968A
Cited
US2916004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |