Patent US2970498A successfully refreshed from Google Patents.
US2970498A
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US
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Power transmission mechanism including hydraulic and friction clutches
Assignee: Napier Turbochargers Ltd
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Filing: 1958-01-21
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Granted: 1961-02-07
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Expires: 1978-01-21
Abstract
No abstract record available.
Inventors
- 👤 George H Murray
- 👤 Adrian L Catford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:50
CPC Classifications
F; F16; F16D; F16D47/00; F16D47/06; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19037; Y10T74/19149; Y10T74/19153; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19265
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |