Patent US3148537A successfully refreshed from Google Patents.
US3148537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyna-electronic compensator
Assignee: North American Aviation Corp
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Filing: 1956-11-26
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Granted: 1964-09-15
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Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 Ted W Berwin
- 👤 Frederick F Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:37
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32; H03F1/33; G; G01; G01L; G01L23/00; G01R; G01R13/00; G01R13/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
APPARATUS FOR REPRODUCING THE TRUE WAVEFORM OF UNKNOWN AND TRANSIENT VIBRATORY OR PRESSURE PHENOMENA COMPRISING A MECHANICAL TO ELECTRICAL PICKUP ADAPTED TO SENSE SAID PHENOMENA AND PROVIDE AN ELECTRICAL OUTPUT WHICH IS A NON-LINEAR FUNCTION OF THE SENSED PHENOMENA, SAID PICKUP HAVING AN INERTIA AND COMPLIANCE AND DAMPING RATIO; A FIRST DIFFERENTIATOR COMPRISING A CAPACITOR HAVING ONE SIDE THEREOF COUPLED TO THE OUTPUT OF SAID PICKUP, AN AMPLIFIER HAVING A VARIABLE FEEDBACK RESISTOR, A POTENTIOMETER, SAID AMPLIFIER HAVING AN INPUT FROM SAID CAPACITOR AND AN OUTPUT TO SAID POTENTIOMETER; A SECOND DIFFERENTIATOR COMPRISING A SECOND AMPLIFIER HAVING A SECOND VARIABLE FEEDBACK RESISTOR, A SECOND CAPACITOR COUPLING
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |