US2658969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic circuit breaker actuating mechanism
Assignee: PACIFIC ELECTRIC MANUFACTURING CORP
•
Filing: 1950-04-17
•
Granted: 1953-11-10
•
Expires: 1970-04-17
Abstract
No abstract record available.
Inventors
- 👤 Donald M Umphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US537103A
Cited
US1595755A
Cited
US1836813A
Cited
US1873787A
Cited
US2360687A
Cited
US2496553A
Cited
US2411360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |