US2827977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door interlock shunt for circuit for railway vehicles
Assignee: General Electric Co
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Filing: 1955-02-10
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Granted: 1958-03-25
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Expires: 1975-02-10
Abstract
No abstract record available.
Inventors
- 👤 Harold G Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:30
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/32; B60L2200/00; B60L2200/26
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |