US2840663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: Westinghouse Electric Corp
•
Filing: 1954-05-05
•
Granted: 1958-06-24
•
Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Merl E Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:46
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/2463; H01H71/2454; H01H71/2472; H01H71/2481
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190002047A
Cited
US2611013A
Cited
US2622167A
Cited
US2632823A
Cited
US2669623A
Cited
US2709731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |