Patent US2552239A successfully refreshed from Google Patents.
US2552239A
Expired / Lapsed
US
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Turbine rotor cooling arrangement
Assignee: General Electric Co
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Filing: 1947-12-23
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Granted: 1951-05-08
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Expires: 1967-12-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn B Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01K; F01K13/00; F01K13/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1421087A
Cited
GB196931A
Cited
CH195736A
Cited
US2243467A
Cited
US2213940A
Cited
US2487514A
Cited
US2489683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |