Patent US3215133A successfully refreshed from Google Patents.
US3215133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine compression operated piezoelectric ignition system
Assignee: Motors Liquidation Co
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Filing: 1963-11-22
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Granted: 1965-11-02
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Expires: 1983-11-22
Abstract
No abstract record available.
Inventors
- 👤 John M Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:13
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
IN COMBINATION, AN INTERNAL COMBUSTION ENGINE HAVING A CYLINDER AND A RECIPROCABLE PISTON, A SPARK DISCHARGE DEVICE FOR FIRING THE COMBUSTIBLE MIXTURE IN SAID CYLINDER, A PIEZOELECTRIC CRYSTAL CONNECTED WITH SAID SPARK DISCHARGE DEVICE FOR DIRECTLY FIRING SAID SPARK DISCHARGE DEVICE FROM THE VOLTAGE DEVELOPED BY SAID CRYSTAL WHEN IT IS STRESSED, AN ELEMENT SEPARATE FROM SAID PISTON SHIFTABLE BY ENGINE CYLINDER PRESSURE AND OPERABLE TO STRESS SAID PIEXOELECTRIC CRYSTAL, AND MEANS FOR VARYING THE PRELOADING OF SAID PIEZOELECTRIC CRYSTAL IN ACCORDANCE WITH A CONDITION OF OPERATION OF SAID ENGINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |