US2586054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pusher turboprop exhaust system
Assignee: Northrop Grumman Corp
•
Filing: 1948-08-21
•
Granted: 1952-02-19
•
Expires: 1968-08-21
Abstract
No abstract record available.
Inventors
- 👤 Jonas Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:31
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/46; B64C11/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2026885A
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US2403797A
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GB592883A
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US2446663A
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GB586577A
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GB588096A
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US2434319A
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US2488783A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |