Patent US5242461A successfully refreshed from Google Patents.
US2528202A
Expired / Lapsed
US
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Radio navigation system
Assignee: RCA Corp
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Filing: 1945-08-30
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Granted: 1950-10-31
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Expires: 1965-08-30
Abstract
No abstract record available.
Inventors
- 👤 Wolff Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:19
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/765; G01S1/00; G01S1/02; G01S7/00; G01S7/003; G01S7/02; G01S7/04; G01S7/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |