US2463233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse echo apparatus for spotting shellfire
Assignee: General Electric Co
•
Filing: 1943-01-22
•
Granted: 1949-03-01
•
Expires: 1963-01-22
Abstract
No abstract record available.
Inventors
- 👤 Ernst F W Alexanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR495264A
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US1305967A
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US1297873A
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US1363861A
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US1705146A
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US1682034A
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US1716821A
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US1846854A
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US1924156A
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US1913793A
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US1987765A
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GB399751A
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GB428759A
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US2190569A
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US2268643A
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US2409462A
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US2419205A
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US2408742A
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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) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |