US2593225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase circuit interrupter
Assignee: McGraw Electric Co
•
Filing: 1948-10-01
•
Granted: 1952-04-15
•
Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Anthony Van Ryan
- 👤 William R Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:18
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1180751A
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US1773356A
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US1954849A
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US2249813A
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US2130840A
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US2125157A
Cited
US2280899A
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US2414786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |