Patent US2821277A successfully refreshed from Google Patents.
US2821277A
Expired / Lapsed
US
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Splined clutches
Assignee: English Electric Co Ltd
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Filing: 1954-10-21
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Granted: 1958-01-28
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Expires: 1974-10-21
Abstract
No abstract record available.
Inventors
- 👤 Hughes John Oliver Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:24
CPC Classifications
F; F16; F16D; F16D11/00; F16D11/08; F16D11/10; F16D2011/008; Y; Y10; Y10T; Y10T403/00; Y10T403/59; Y10T403/591; Y10T403/70; Y10T403/7026; Y10T403/7033
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |