US2506581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for cooling gas turbine blades
Assignee: Individual
•
Filing: 1945-06-30
•
Granted: 1950-05-09
•
Expires: 1965-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Albon C Cowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:44
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; F01D5/18; F01D5/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE346599C
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US1702264A
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US2149510A
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US2220420A
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US2236426A
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CH218976A
Cited
US2489683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |