Patent US2450256A successfully refreshed from Google Patents.
US2450256A
Expired / Lapsed
US
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Electric switch
Assignee: Trumbull Electric Manufacturing Co
•
Filing: 1945-07-31
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Granted: 1948-09-28
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Expires: 1965-07-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond N Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:30
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1412002A
Cited
US1127996A
Cited
US1294862A
Cited
US1905038A
Cited
US2015561A
Cited
US1889515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |