Patent US3047257A successfully refreshed from Google Patents.
US3047257A
Expired / Lapsed
US
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Device for changing airfoil profile
Assignee: Lockheed Martin Corp
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Filing: 1958-04-24
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Granted: 1962-07-31
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Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Milton A Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; B; B64; B64C; B64C3/00; B64C3/38; B64C3/44; B64C3/46; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2405208A
Cited
US2597769A
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US2660663A
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US2643833A
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US2753134A
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US2753835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |