US2840394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible joint engine exhaust duct with bellows seal
Assignee: Rohr Inc
•
Filing: 1952-02-14
•
Granted: 1958-06-24
•
Expires: 1972-02-14
Abstract
No abstract record available.
Inventors
- 👤 Fred H Rohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/1004; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F01N13/1816; F01N13/1827
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2242604A
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US2337038A
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US2381426A
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US2451252A
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US2417250A
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US2502753A
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US2604339A
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US2616278A
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US2712456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |