US2992529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine blade cooling
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1956-08-23
•
Granted: 1961-07-18
•
Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 Sampietro Achilles Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:53
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F02C7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2159422A
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US2779565A
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US2650060A
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US2611440A
Cited
GB677052A
Cited
US2625012A
Cited
US2672013A
Cited
US2778601A
Cited
US2672010A
Cited
US2748566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |