Patent US2496937A successfully refreshed from Google Patents.
US2496937A
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Speed changing apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1946-07-24
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Granted: 1950-02-07
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Expires: 1966-07-24
Abstract
No abstract record available.
Inventors
- 👤 Hilbert E Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:07
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/30; D06F37/36; F; F16; F16H; F16H61/00; F16H61/02; F16H61/0293; F16H2710/00; F16H2710/04; F16H2710/06; F16H2710/08; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19442; Y10T74/19447
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |