US3552873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supersonic jet engine
Assignee: Individual
•
Filing: 1969-01-10
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Granted: 1971-01-05
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Expires: 1989-01-10
Abstract
Abstract A JET ENGINE AERODYNAMICALLY DESIGNED INTERNALLY FOR EFFICIENT OPERATION UNDER SUPERSONIC AIRFLOW CONDITIONS IS MADE COMPATIBLE WITH SUBSONIC CONDITIONS BY USE OF VARIABLE FLOW RESTRICTING THROAT PASSAGES IN THE AIR INLET SECTION OF THE ENGINE AND BETWEEN THE COMPRESSOR AND THE COMBUSTION CHAMBERS. SUPERSONIC PRESSURE RECOVERY IS THEREBY PRODUCED UNDER SUBSONIC CONDITIONS FOR START-UP PURPOSES. EFFICIENCY IS IMPROVED BY COUNTER-ROTATING IMPELLERS IN THE COMPRESSOR HAVING SWEEP ANGLE BLADE TIPS.
Inventors
- 👤 John N Ghougasian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:06
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/16; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F02C3/00; F02C3/04; F02C3/06; F02C3/067; F02C7/00; F02C7/26; F02K; F02K1/00; F02K1/54; F02K1/56; F02K1/566
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |