Patent US2287797A successfully refreshed from Google Patents.
US2287797A
Expired / Lapsed
US
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Apparatus for controlling electric circuits
Assignee: POWER EQUIPMENT Co
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Filing: 1939-07-29
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Granted: 1942-06-30
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Expires: 1959-07-29
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Hanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70
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) | 1945-06-29 | 1945-12-29 | 1946-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-29 | 1949-12-29 | 1950-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-29 | 1953-12-29 | 1954-06-30 | $7700.00 | Window Closed / Lapsed |