US2988324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotors for multi-stage axial flow compressors or turbines
Assignee: Napier Turbochargers Ltd
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Filing: 1958-08-05
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Granted: 1961-06-13
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Expires: 1978-08-05
Abstract
No abstract record available.
Inventors
- 👤 Michael J Sutters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:10
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3069; F01D5/02; F01D5/06
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |