Patent US2457112A successfully refreshed from Google Patents.
US2457112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-delay switch operating system
Assignee: International Standard Electric Corp
•
Filing: 1944-10-10
•
Granted: 1948-12-28
•
Expires: 1964-10-10
Abstract
No abstract record available.
Inventors
- 👤 Abercrombie David John
- 👤 Brettingham-Moore Edwa Anthony
- 👤 Muscio Winston Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:58
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/546
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |