Patent US2533670A successfully refreshed from Google Patents.
US2533670A
Expired / Lapsed
US
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Electronic range finding apparatus
Assignee: EMI Ltd
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Filing: 1948-01-08
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Granted: 1950-12-12
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Expires: 1968-01-08
Abstract
No abstract record available.
Inventors
- 👤 Hart Geoffrey Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:44
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2178074A
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US2408414A
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US2468032A
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US2307237A
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US2408415A
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US2422697A
Cited
US2436827A
Cited
US2481354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |