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US2456538A
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Control for alternating current motors
Assignee: Cutler Hammer Inc
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Filing: 1946-11-12
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Granted: 1948-12-14
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Expires: 1966-11-12
Abstract
No abstract record available.
Inventors
- 👤 Edwin W Seeger
- 👤 Norbert L Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:16
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C13/22; B66C13/23; B66C13/26; B66C2700/00; B66C2700/08; B66C2700/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1123321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |