Patent US2814680A successfully refreshed from Google Patents.
US2814680A
Expired / Lapsed
US
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Miniature circuit controllers
Assignee: Westinghouse Air Brake Co
•
Filing: 1954-05-19
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Granted: 1957-11-26
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Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 James W Sherrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:54
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1362661A
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US1521591A
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US1547745A
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US1752213A
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US2069171A
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US2020402A
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US2286077A
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US2332554A
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US2382970A
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US2503569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |