Patent US2652294A successfully refreshed from Google Patents.
US2652294A
Expired / Lapsed
US
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Turbine bearing cooling means
Assignee: Power Jets Research and Development Ltd
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Filing: 1948-11-26
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Granted: 1953-09-15
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Expires: 1968-11-26
Abstract
No abstract record available.
Inventors
- 👤 Islip Leonard
- 👤 Perry Sydney William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:32
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/08; F01D25/12; F01D25/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US434995A
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US722875A
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US1404538A
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US1530982A
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US2184197A
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US2423973A
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US2386639A
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US2493160A
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US2573597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |