US2675776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sea marker
Assignee: —
•
Filing: —
•
Granted: 1954-04-20
•
Expires: 1971-04-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
B; B63; B63B; B63B51/00; B63B51/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2236296A
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US394319A
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US429384A
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US519161A
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US389615A
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US740317A
Cited
US774902A
Cited
US1008356A
Cited
US1118420A
Cited
US2118432A
Cited
US2139092A
Cited
US2152856A
Cited
US2328916A
Cited
US2420286A
Cited
US2357417A
Cited
US2402143A
Cited
US2439598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |