US2472129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio navigation system
Assignee: Unisys Corp
•
Filing: 1943-08-04
•
Granted: 1949-06-07
•
Expires: 1963-08-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward C Streeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/22; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20; G01S1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1340573A
Cited
GB224604A
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US1893009A
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US2148267A
Cited
US2066949A
Cited
US2137847A
Cited
US2204438A
Cited
US2165800A
Cited
US2403626A
Cited
US2423337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |