Patent US2561329A successfully refreshed from Google Patents.
US2561329A
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US
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Electric energy control system
Assignee: International Standard Electric Corp
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Filing: 1944-10-17
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Granted: 1951-07-24
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Expires: 1964-10-17
Abstract
No abstract record available.
Inventors
- 👤 Per O Ahlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:48
CPC Classifications
H; H03; H03F; H03F9/00; H03F9/02; G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997657A
Cited
US2136243A
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US2287754A
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US2337253A
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US2322130A
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US2253705A
Cited
US2306998A
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US2278151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |