US2791385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Landing drag flap and lift spoiler
Assignee: Lockheed Martin Corp
•
Filing: 1952-03-10
•
Granted: 1957-05-07
•
Expires: 1972-03-10
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
B; B64; B64C; B64C9/00; B64C9/14; B64C9/16; B64C3/00; B64C3/58; B64C9/18; Y; Y02; Y02T; Y02T50/00; Y02T50/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2130958A
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US2117607A
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US2194796A
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US2263992A
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GB529892A
Cited
US2352062A
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US2405726A
Cited
US2344945A
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US2480040A
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US2635837A
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US2445833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |