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Patent US2815131A successfully refreshed from Google Patents.
US2815131A
Expired / Lapsed
US
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Device for lifting boats
Assignee: LUNSMAN Manufacturing Co Inc
•
Filing: 1953-03-20
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Granted: 1957-12-03
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Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 John E Lunsman
- 👤 Norman F Lunsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:58
CPC Classifications
B; B63; B63B; B63B23/00; B63B23/02; B63B23/04; B63B23/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1116761A
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US1192158A
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US1300567A
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US1429432A
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US2294864A
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US2185083A
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US2465118A
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US2581676A
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US2552424A
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US2632900A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |