US2748857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time element relay
Assignee: SPX Technologies Inc
•
Filing: 1951-11-16
•
Granted: 1956-06-05
•
Expires: 1971-11-16
Abstract
No abstract record available.
Inventors
- 👤 Oscar S Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:14
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2388686A
Cited
US2039714A
Cited
US2143692A
Cited
US2163419A
Cited
US2312077A
Cited
US2407757A
Cited
US2496310A
Cited
GB616607A
Cited
US2479992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |