US2432902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric selective signaling or control system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1943-08-25
•
Granted: 1947-12-16
•
Expires: 1963-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jones Cyril Edward Palmer
- 👤 Birss Robert Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:17
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2139135A
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US2201296A
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US2340609A
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US2301961A
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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) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |