Patent US2540594A successfully refreshed from Google Patents.
US2540594A
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US
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Ram jet engine having variable area inlets
Assignee: Lockheed Martin Corp
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Filing: 1946-08-23
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Granted: 1951-02-06
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Expires: 1966-08-23
Abstract
No abstract record available.
Inventors
- 👤 Nathan C Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:54
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02C; F02C7/00; F02C7/04; F02C7/042; F02K1/00; F02K1/06; F02K1/08; F02K1/15; F05; F05D; F05D2260/00; F05D2260/20; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T137/00; Y10T137/0536
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1030890A
Cited
US991230A
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DE544834C
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US2191532A
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FR47412E
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FR50033E
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US2402363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |