US3020004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine-propeller power units for aircraft
Assignee: Napier Turbochargers Ltd
•
Filing: 1958-12-09
•
Granted: 1962-02-06
•
Expires: 1978-12-09
Abstract
No abstract record available.
Inventors
- 👤 Blyth Jack Vallis
- 👤 Upton George Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:36
CPC Classifications
B; B64; B64D; B64D35/00; B64D27/00; B64D27/02; B64D27/10; B64D27/14; Y; Y02; Y02T; Y02T50/00; Y02T50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2488783A
Cited
US2539960A
Cited
US2457595A
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US2587649A
Cited
US2485126A
Cited
US2718756A
Cited
US2912823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |