US2481996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air blast circuit breaker
Assignee: FERGUSON PAILIN Ltd
•
Filing: 1945-04-02
•
Granted: 1949-09-13
•
Expires: 1965-04-02
Abstract
No abstract record available.
Inventors
- 👤 Grunewald Friedrich
- 👤 Dakin Eric Mc-Ewan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:35
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/7015; H01H33/7038
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1759419A
Cited
US1937482A
Cited
US1910068A
Cited
US2018136A
Cited
DE606982C
Cited
FR754972A
Cited
US2060282A
Cited
US2067673A
Cited
US2133938A
Cited
US2155846A
Cited
US2302592A
Cited
US2313159A
Cited
US2306242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |