Patent US2977177A successfully refreshed from Google Patents.
US2977177A
Expired / Lapsed
US
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Aircraft flight path recording device
Assignee: Lockheed Martin Tactical Systems Inc
•
Filing: 1958-03-24
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Granted: 1961-03-28
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Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Mclaughlin Thomas
- 👤 Abraham G Merlin
- 👤 Allen W Beishline
- 👤 Bergherr William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:27
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190927084A
Cited
US1123795A
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US1293747A
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US1261965A
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US2171327A
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US2395351A
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US2424118A
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US2566546A
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US2669500A
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US2606092A
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US2661260A
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US2699606A
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US2727308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |