Patent US2682049A successfully refreshed from Google Patents.
US2682049A
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Beat frequency navigation and guidance system
Assignee: Raytheon Co
•
Filing: 1949-12-14
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Granted: 1954-06-22
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Expires: 1969-12-14
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1933248A
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US1815246A
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US2148267A
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US2413694A
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US2413620A
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US2451823A
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US2423305A
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USRE23050E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |