US2561450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch
Assignee: Cutler Hammer Inc
•
Filing: 1945-03-21
•
Granted: 1951-07-24
•
Expires: 1965-03-21
Abstract
No abstract record available.
Inventors
- 👤 Frank J Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:56
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US595330A
Cited
US1706158A
Cited
US2071149A
Cited
DE688207C
Cited
US2227434A
Cited
US2310056A
Cited
US2328825A
Cited
US2390344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |