US2641040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for cooling turbine blades by air
Assignee: DANIEL AND FLORENCE GUGGENHEIM
•
Filing: 1948-01-02
•
Granted: 1953-06-09
•
Expires: 1968-01-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:47
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/04; F04D25/045; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081; F01D5/12; F01D5/14; F01D5/18; Y; Y10; Y10S; Y10S60/00; Y10S60/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB452412A
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US2149510A
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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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |