Patent US2289171A successfully refreshed from Google Patents.
US2289171A
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US
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Speed responsive device
Assignee: Westinghouse Electric Corp
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Filing: 1940-02-20
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Granted: 1942-07-07
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Expires: 1960-02-20
Abstract
No abstract record available.
Inventors
- 👤 Cyril E Baston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:10
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/30; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-07-06 | 1946-01-05 | 1946-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-06 | 1950-01-05 | 1950-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-06 | 1954-01-05 | 1954-07-07 | $7700.00 | Window Closed / Lapsed |