US2912622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical relays
Assignee: English Electric Co Ltd
•
Filing: 1954-07-12
•
Granted: 1959-11-10
•
Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Warringto Albert Rus Cortlandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:55
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1880576A
Cited
US2404643A
Cited
US2525016A
Cited
US2567158A
Cited
US2599228A
Cited
US2632886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |