Patent US2822448A successfully refreshed from Google Patents.
US2822448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-break circuit breaker
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1954-12-16
•
Granted: 1958-02-04
•
Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Wegmann Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/42; D01H1/425; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H01H; H01H9/00; H01H9/30; H01H9/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1431961A
Cited
US1878959A
Cited
US2165819A
Cited
US2322353A
Cited
US2386659A
Cited
FR59145E
Cited
US2439674A
Cited
FR981678A
Cited
US2645693A
Cited
US2656442A
Cited
US2707177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |