Patent US4785691A successfully refreshed from Google Patents.
Patent US3218513A successfully refreshed from Google Patents.
US3218513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized ignition system
Assignee: Motors Liquidation Co
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Filing: 1960-06-23
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Granted: 1965-11-16
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Expires: 1980-06-23
Abstract
No abstract record available.
Inventors
- 👤 Brooks H Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:39
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/0407; F02P3/0435
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
AN INTERNAL COMBUSTION ENGINE IGNITION SYSTEM FOR FIRING A SPARK PLUG OF THE ENGINE COMPRISING, A SOURCE OF DIRECT-CURRENT POWER, A IGNITION COIL HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID SECONDARY WINDING WITH SAID SPARK PLUG, AN NPN TYPE OF TRANSISTOR HAVING A COLLECTOR ELECTRODE, A BASE ELECTRODE AND AN EMITTER ELECTRODE, MEANS CONNECTING SAID POWER SOURCE, THE PRIMARY WINDING OF SAID IGNITION COIL AND THE COLLECTOR-EMITTER CIRCUIT OF SAID TRANSISTOR IN SERIES WHEREBY THE CURRENT FLOW THROUGH THE PRIMARY WINDING OF SAID IGNITION COIL IS CONTROLLED BY SAID TRANSISTOR, BREAKER CONTACT MEANS OPENED AND CLOSED IN SYNCHRONISM WITH OP-
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |