Patent US3072823A successfully refreshed from Google Patents.
US3072823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine ignition system
Assignee: Motors Liquidation Co
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Filing: 1960-06-23
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Granted: 1963-01-08
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Expires: 1980-06-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P3/00; F02P3/02; F02P3/04; F02P3/0407; F02P3/0435; F02P7/02; F02P7/03; F02P7/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
AN IGNITION SYSTEM FOR CONTROLLING THE FIRING OF A SPARK PLUG IN AN INTERNAL COMBUSTION ENGINE COMPRISING, A SOURCE OF DIRECT CURRENT POWER, AN IGNITION COIL HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID SECONDARY WINDING WITH SAID SPARK PLUG, FIRST AND SECOND SEMICONDUCTORS, MEANS INTERCONNECTING SAID SEMICONDUCTORS AND SAID POWER SOURCE WHEREBY SAID FIRST SEMICONDUCTOR IS SUBSTANTIALLY FULLY CONDUCTIVE WHEN THE SECOND SEMICONDUCTOR IS SUBSTANTIALLY FULLY NON-CONDUCTIVE, MEANS CONNECTING SAID FIRST SEMICONDUCTOR BETWEEN
Claim 2
Dependent Claim
77 words
AN IGNITION SYSTEM FOR CONTROLLING THE FIRING OF A SPARK PLUG IN AN INTERNAL COMBUSTION ENGINE COMPRISING, A SOURCE OF DIRECT CURRENT POWER, AN IGNITION COIL HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID SECONDARY WINDING WITH SAID SPARK PLUG, FIRST AND SECOND SEMICONDUCTORS, MEANS INTERCONNECTING SAID SEMICONDUCTORS AND SAID POWER SOURCE WHEREBY SAID FIRST SEMICONDUCTOR IS SUBSTANTIALLY FULLY CONDUCTIVE WHEN THE SECOND SEMICONDUCTOR IS SUBSTANTIALLY FULLY NON-CONDUCTIVE, MEANS CONNECTING SAID FIRST SEMICONDUCTOR BETWEEN
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |