US2984770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic devices
Assignee: Cutler Hammer Inc
•
Filing: 1957-04-22
•
Granted: 1961-05-16
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Irvin W Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/546; H01H50/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2824191A
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US2871422A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |