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Patent US2987883A successfully refreshed from Google Patents.
US2987883A
Expired / Lapsed
US
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Jet engine noise suppression nozzle with aerodynamic supplemental fluting
Assignee: Boeing Co
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Filing: 1959-06-22
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Granted: 1961-06-13
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Expires: 1979-06-22
Abstract
No abstract record available.
Inventors
- 👤 John A Lawler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:01
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2389059A
Cited
US2865169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |