US2794178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically actuated and held ball armature switching devices
Assignee: Boeing Co
•
Filing: 1954-04-05
•
Granted: 1957-05-28
•
Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 Francis D Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:19
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/288
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US684378A
Cited
US1191976A
Cited
FR428146A
Cited
US1169475A
Cited
DE554096C
Cited
DE654405C
Cited
US2111550A
Cited
US2253856A
Cited
US2310138A
Cited
US2412123A
Cited
US2732458A
Cited
US2732454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |