Patent US2757629A successfully refreshed from Google Patents.
US2757629A
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US
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Boat stabilizers
Assignee: HARWILL Inc
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Filing: 1953-11-06
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Granted: 1956-08-07
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Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 Douglas G Wiltse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:30
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/18; B63B1/20; B63B43/00; B63B43/02; B63B43/04; B63B43/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR395111A
Cited
US1169947A
Cited
GB125378A
Cited
US1609468A
Cited
US2347841A
Cited
US2619065A
Cited
US2683269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |