Patent US2597257A successfully refreshed from Google Patents.
US2597257A
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US
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Electric switch
Assignee: Allis Chalmers Corp
•
Filing: 1948-06-11
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Granted: 1952-05-20
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Expires: 1968-06-11
Abstract
No abstract record available.
Inventors
- 👤 Henry V Nye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44; H01H9/38; H01H9/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932061A
Cited
US1967623A
Cited
US1929049A
Cited
US2348228A
Cited
US2363287A
Cited
US2477189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |