US3534304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switchgear with actuating means incorporating an overcurrent trip
Assignee: English Electric Co Ltd
•
Filing: 1968-11-04
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Granted: 1970-10-13
•
Expires: 1988-11-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred Alexander Robinson
- 👤 Edward Raymond Burdett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:42
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/666; H01H77/00; H01H77/02; H01H77/10; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/32; H01H71/321; H01H71/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3425009A
Cited
US3366900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |