US2806519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-systems for internal combustion engines with means to compensate for an operating variable
Assignee: Rolls Royce PLC
•
Filing: 1950-06-16
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Granted: 1957-09-17
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Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
- 👤 Basford Kenneth Arnold
- 👤 Redfern Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0261; F02D2700/0266; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/8593; Y10T137/85978
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2193240A
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US2275689A
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US2352584A
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US2422808A
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US2658566A
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US2471541A
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US2564107A
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US2545698A
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US2564124A
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US2636553A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |