Patent US3272191A successfully refreshed from Google Patents.
US3272191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine spark control for reducing smog
Assignee: Individual
•
Filing: 1965-03-04
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Granted: 1966-09-13
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 Walker Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:36
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103; F02P5/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE HAVING AN INGNITION SYSTEM INCLUDING A VACUUM CONTROLLED SPARK ADVANCE MEANS, A VACUMM CONTROLLED SPARK RETARD MEANS, A DRIVE SHAFT DRIVEN BY SAID ENGINE, MEANS FOR SENSING THE SPEED OF ROTATION OF SAID DRIVE SHAFT, A VALVE CONTROLLED BY SAID SPEED SENSING MEANS FOR APPLYING HIGH ENGINE DEVELOPED SUCTION TO SAID RETARD DEVICE AT PREDETERMINED LOW DRIVE SHAFT SPEEDS TO REGARD SAID SPARK ADVANCE MEANS, SAID VALVE APPLYING HIGH SUCTION TO SAID RETARD DEVICE AT VARIOUS ENGINE SPEEDS WHILE SAID VEHICLE IS STATIONARY.
Claim 2
Dependent Claim
91 words
AN INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE HAVING AN INGNITION SYSTEM INCLUDING A VACUUM CONTROLLED SPARK ADVANCE MEANS, A VACUMM CONTROLLED SPARK RETARD MEANS, A DRIVE SHAFT DRIVEN BY SAID ENGINE, MEANS FOR SENSING THE SPEED OF ROTATION OF SAID DRIVE SHAFT, A VALVE CONTROLLED BY SAID SPEED SENSING MEANS FOR APPLYING HIGH ENGINE DEVELOPED SUCTION TO SAID RETARD DEVICE AT PREDETERMINED LOW DRIVE SHAFT SPEEDS TO REGARD SAID SPARK ADVANCE MEANS, SAID VALVE APPLYING HIGH SUCTION TO SAID RETARD DEVICE AT VARIOUS ENGINE SPEEDS WHILE SAID VEHICLE IS STATIONARY.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |