US2491314A
Expired / Lapsed
US
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Turbogenerator cooling system
Assignee: General Electric Co
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Filing: 1948-05-11
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Granted: 1949-12-13
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Expires: 1968-05-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Hopkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
F; F01; F01K; F01K27/00; F01K27/02; H; H02; H02K; H02K9/00; H02K9/10; H02K9/12
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) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |