US2863952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric selective signalling systems
Assignee: The General Electric Company PLC
•
Filing: 1954-09-28
•
Granted: 1958-12-09
•
Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Scowcroft John
- 👤 Beesley John Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:03
CPC Classifications
H; H04; H04Q; H04Q5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1778768A
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US1804767A
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US1841084A
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US1889466A
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GB434446A
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US2186315A
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US2268880A
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US2276518A
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DE828722C
Cited
US2788394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |