Patent US2671897A successfully refreshed from Google Patents.
US2671897A
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Automatically synchronized long range navigation pulse transmitter
Assignee: Individual
•
Filing: 1945-07-03
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Granted: 1954-03-09
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Expires: 1965-07-03
Abstract
No abstract record available.
Inventors
- 👤 Roger B Woodbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:51
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20; G01S1/24; H; H03; H03L; H03L7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2085424A
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US2106806A
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US2201978A
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US2209507A
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US2449174A
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US2470464A
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US2425314A
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US2531919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |