Patent US2205787A successfully refreshed from Google Patents.
US2572041A
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US
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Selective azimuth signaling system
Assignee: Unisys Corp
•
Filing: 1947-10-29
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Granted: 1951-10-23
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Expires: 1967-10-29
Abstract
No abstract record available.
Inventors
- 👤 George B Litchford
- 👤 Lyman Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2253958A
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US2313048A
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US2252699A
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US2368318A
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US2302102A
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US2377902A
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US2406396A
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US2420605A
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US2387902A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |