US3455413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic silencer for jet engines
Assignee: JACK C HENLEY
•
Filing: 1967-08-22
•
Granted: 1969-07-15
•
Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Jack C Henley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:21
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/78; F02K1/82; F02K1/827
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR495271A
Cited
FR22462E
Cited
FR859272A
Cited
US2375180A
Cited
GB599275A
Cited
US2936846A
Cited
US2957537A
Cited
US3347466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |