US3239678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric power system
Assignee: Sonus Corp
•
Filing: 1961-03-01
•
Granted: 1966-03-08
•
Expires: 1981-03-01
Abstract
No abstract record available.
Inventors
- 👤 Kolm Carol
- 👤 Peter H Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/18; H02N2/186; F; F23; F23Q; F23Q2/00; F23Q2/28; F23Q2/285; F23Q2/287; F23Q3/00; F23Q3/002; H10; H10N; H10N30/00; H10N30/30; H10N30/304; F23M; F23M2900/00; F23M2900/13003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
AN ELECTRICAL POWER SYSTEM FOR AN AIRCRAFT HAVING A JET ENGINE, SAID SYSTEM COMPRISING, IN COMBINATION, A PLURALITY OF PIEZOELECTRIC TRANSDUCERS MOUNTED FOR INDEPENDENT VIBRATION IN RESPONSE TO ACOUSTICAL ENERGY GENERATED BY SAID ENGINE, EACH OF SAID TRANSDUCERS BEING IN THE FORM OF A PLATE MOUNTED FOR FLEXURE ABOUT AN AXIS, SAID PLATE HAVING AN ELECTRODE ON ONE FACE THEREOF AND A PAIR OF ELECTRODES ON THE OPPOSITE FACE THEREOF ON OPPOSITE SIDES OF SAID AXIS, A SEPARATE RECTIFIER CONNECTED TO EACH OF SAID
References Cited (Backward Citations)
US2361071A
Cited
US2522389A
Cited
US2539535A
Cited
US2659829A
Cited
US2638556A
Cited
US2676273A
Cited
US2808522A
Cited
US3058015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |