US2987806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making turbine blades and the like
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1956-05-24
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Granted: 1961-06-13
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Expires: 1976-05-24
Abstract
No abstract record available.
Inventors
- 👤 Edward G Pekarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:02
CPC Classifications
B; B21; B21K; B21K3/00; B21K3/04; C; C22; C22F; C22F1/00; C22F1/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US757819A
Cited
US736551A
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US1493211A
Cited
US1670345A
Cited
US2422193A
Cited
GB660282A
Cited
US2738571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |