US2819765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound powerr plant
Assignee: Napier Turbochargers Ltd
•
Filing: 1952-08-14
•
Granted: 1958-01-14
•
Expires: 1972-08-14
Abstract
No abstract record available.
Inventors
- 👤 Chatterton Ernest Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0274
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2346587A
Cited
US2556190A
Cited
US2400306A
Cited
US2516123A
Cited
US2565482A
Cited
US2581334A
Cited
US2583537A
Cited
US2656675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |