US1661740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for effecting energization control of an electric circuit
Assignee: Cutler Hammer Manufacturing Co
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Filing: 1921-08-13
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Granted: 1928-03-06
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Expires: 1941-08-13
Abstract
No abstract record available.
Inventors
- 👤 Erwin R Stoekle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:39
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/02; H04L27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-03-06 | 1931-09-05 | 1932-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-06 | 1935-09-05 | 1936-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-06 | 1939-09-05 | 1940-03-06 | $7700.00 | Window Closed / Lapsed |