US2551822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter arc extinguisher
Assignee: Westinghouse Electric Corp
•
Filing: 1947-12-30
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Granted: 1951-05-08
•
Expires: 1967-12-30
Abstract
No abstract record available.
Inventors
- 👤 Bingenheimer Melvin
- 👤 Eugene J Walker
- 👤 Toth Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:22
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/34; H01H9/342; H01H9/36; H01H9/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1705700A
Cited
US2005684A
Cited
US2147419A
Cited
US2160681A
Cited
US2244061A
Cited
US2363606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |