Patent US2989608A successfully refreshed from Google Patents.
US2989608A
Expired / Lapsed
US
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Electrical protective equipment
Assignee: E M P Electric Ltd
•
Filing: 1957-05-28
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Granted: 1961-06-20
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Expires: 1977-05-28
Abstract
No abstract record available.
Inventors
- 👤 Hicks Bruce Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:55
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2158859A
Cited
US2315320A
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US2314017A
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US2305394A
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US2374560A
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US2453688A
Cited
US2551858A
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US2777095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |