Patent US3487264A successfully refreshed from Google Patents.
US3487264A
Expired / Lapsed
US
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Means for preventing excessive current flow between a.c. power networks
Assignee: Associated Electrical Industries Ltd
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Filing: 1967-05-01
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Granted: 1969-12-30
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Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 John Raymond Cure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:39
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14; G05F3/00; G05F3/02; G05F3/04; G05F3/06; H; H02; H02H; H02H9/00; H02H9/02; H02H9/021; H02H9/028
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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |