Patent US2561452A successfully refreshed from Google Patents.
US2561452A
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US
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Circuit testing repeating circuit breaker
Assignee: McGraw Electric Co
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Filing: 1949-01-13
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Granted: 1951-07-24
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Expires: 1969-01-13
Abstract
No abstract record available.
Inventors
- 👤 Anthony Van Ryan
- 👤 Rigert Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:09
CPC Classifications
H; H01; H01H; H01H75/00; H01H75/02; H01H75/04; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |