US2757321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1950-11-18
•
Granted: 1956-07-31
•
Expires: 1970-11-18
Abstract
No abstract record available.
Inventors
- 👤 James M Wallace
- 👤 Andrew W Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:12
CPC Classifications
H; H01; H01H; H01H75/00; H01H75/02; H01H75/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1817592A
Cited
US2337713A
Cited
US2459327A
Cited
US2387372A
Cited
US2515530A
Cited
US2560831A
Cited
US2488601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |