US2550792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch
Assignee: Cutler Hammer Inc
•
Filing: 1946-06-24
•
Granted: 1951-05-01
•
Expires: 1966-06-24
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Fath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:23
CPC Classifications
H; H01; H01H; H01H21/00; H01H21/02; H01H21/18; H01H21/22; H01H21/24; H01H21/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1169957A
Cited
US1386897A
Cited
US1633825A
Cited
US1768756A
Cited
GB379687A
Cited
FR725626A
Cited
GB439641A
Cited
US2059023A
Cited
US2130153A
Cited
US2181829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |