Patent US5031689A successfully refreshed from Google Patents.
US2912221A
Expired / Lapsed
US
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Apparatus for cooling turbine wheels in combustion turbines
Assignee: Napier Turbochargers Ltd
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Filing: 1954-11-08
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Granted: 1959-11-10
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Chamberlin Reginald He Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:43
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081; F01D5/082; F01D11/00; F01D11/02; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2434134A
Cited
FR927749A
Cited
US2657901A
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US2598176A
Cited
US2620157A
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US2672013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |