US2563218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated airfoil section and method of making same
Assignee: RTX Corp
•
Filing: 1948-04-09
•
Granted: 1951-08-07
•
Expires: 1968-04-09
Abstract
No abstract record available.
Inventors
- 👤 George F Darracott
- 👤 Gerald N Barba
- 👤 Reichert Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
B; B64; B64F; B64F5/00; B64F5/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1089; Y10T156/1092; Y10T156/1093; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24066; Y10T428/31504; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1346161A
Cited
US1757779A
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US1822940A
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US1874685A
Cited
GB362925A
Cited
GB440714A
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GB484305A
Cited
GB519061A
Cited
US2306295A
Cited
US2503450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |