Patent US2523938A successfully refreshed from Google Patents.
US2523938A
Expired / Lapsed
US
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Reaction propulsion system for aircraft
Assignee: Engineering & Res Corp
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Filing: 1946-05-24
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Granted: 1950-09-26
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Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Henry A Berliner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:20
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/04; B64D; B64D27/00; B64D27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |