US2920241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupters with back-up current-limiting fuses
Assignee: Chase Shawmut Co
•
Filing: 1956-04-16
•
Granted: 1960-01-05
•
Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Philip C Jacobs
- 👤 Frederick J Kozacka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/10; H01H71/00; H01H71/10; H01H71/1081
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2734111A
Cited
US1714722A
Cited
US2140360A
Cited
US2473196A
Cited
US2653203A
Cited
US2770757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |