Patent US2456902A successfully refreshed from Google Patents.
US2456902A
Expired / Lapsed
US
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Contact and shorting mechanism
Assignee: Westinghouse Electric Corp
•
Filing: 1945-03-17
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Granted: 1948-12-21
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Expires: 1965-03-17
Abstract
No abstract record available.
Inventors
- 👤 Robert L Treuthart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H01; H01H; H01H1/00; H01H1/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137362A
Cited
US1543654A
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US1874478A
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US2290344A
Cited
US2163959A
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US2233763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |