Patent US2604276A successfully refreshed from Google Patents.
US2604276A
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Pusher power plant for airplanes
Assignee: Northrop Grumman Corp
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Filing: 1950-09-12
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Granted: 1952-07-22
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Expires: 1970-09-12
Abstract
No abstract record available.
Inventors
- 👤 Michael G Huben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:39
CPC Classifications
B; B64; B64D; B64D27/00; B64D27/02; B64D27/04; B64D27/06; F; F02; F02C; F02C6/00; F02C6/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2411227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |