US2767279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay
Assignee: North Electric Co
•
Filing: 1952-01-25
•
Granted: 1956-10-16
•
Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Donivan L Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:18
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2455049A
Cited
GB215679A
Cited
US1863436A
Cited
US2131789A
Cited
US2043746A
Cited
US2193516A
Cited
US2364656A
Cited
US2310138A
Cited
GB572686A
Cited
GB632794A
Cited
US2606981A
Cited
US2499394A
Cited
US2545587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |