US2591919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus for detecting the presence of moving objects
Assignee: EMI Ltd
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Filing: 1946-04-03
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Granted: 1952-04-08
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Expires: 1966-04-03
Abstract
No abstract record available.
Inventors
- 👤 Collard John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; G; G01; G01S; G01S1/00; G01S1/02; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |