US2977816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic change-speed gearing
Assignee: Bristol Siddeley Engines Ltd
•
Filing: 1959-10-08
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Granted: 1961-04-04
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Expires: 1979-10-08
Abstract
No abstract record available.
Inventors
- 👤 Rice Alec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:45
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0293; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213; Y10T74/2022; Y10T74/20396; Y10T74/20402; Y10T74/2042; Y10T74/20576; Y10T74/20582; Y10T74/2063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2730909A
Cited
US2737058A
Cited
US2757551A
Cited
US2771788A
Cited
US2823555A
Cited
US2767594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |