US2534069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc extinguishing means for alternating current electric switches
Assignee: Arrow Hart and Hegeman Electric Co
•
Filing: 1947-04-09
•
Granted: 1950-12-12
•
Expires: 1967-04-09
Abstract
No abstract record available.
Inventors
- 👤 Harold E Schleicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:12
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44; H01H9/446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1164257A
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US1212125A
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US1799720A
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US1820927A
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US1811451A
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US1705700A
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US1919438A
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US2051478A
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US2159645A
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US2227434A
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US2387033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |