Patent US2536682A successfully refreshed from Google Patents.
US2536682A
Expired / Lapsed
US
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Sea anchor apparatus
Assignee: FRIEDER
•
Filing: 1948-02-25
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Granted: 1951-01-02
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Expires: 1968-02-25
Abstract
No abstract record available.
Inventors
- 👤 Leonard P Frieder
- 👤 Walter S Finken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:42
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/24; B63B21/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US75614A
Cited
US619982A
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US861478A
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FR496440A
Cited
GB176406A
Cited
US1386971A
Cited
GB226851A
Cited
US1965570A
Cited
US2474124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |