US2520520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine marker
Assignee: DALE SERVICE CORP
•
Filing: 1948-01-28
•
Granted: 1950-08-29
•
Expires: 1968-01-28
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Woodard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:31
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US506150A
Cited
US1450287A
Cited
US1610779A
Cited
US1709377A
Cited
US2361177A
Cited
US2401955A
Cited
US2461181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |