US2919104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interstage seals and cooling means in axial flow turbines
Assignee: Napier Turbochargers Ltd
•
Filing: 1954-11-08
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Granted: 1959-12-29
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Blyth Jack Vallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081; F01D25/00; F01D25/08; F01D25/12; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1598176A
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FR571750A
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US2584899A
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US2620157A
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US2648519A
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US2640319A
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US2639579A
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US2738949A
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US2741455A
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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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |