Patent US2203202A successfully refreshed from Google Patents.
Patent US3618907A successfully refreshed from Google Patents.
US3618907A
Expired / Lapsed
US
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Antismog carburetor
Assignee: ALPHA SEVERN
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Filing: 1969-01-28
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Granted: 1971-11-09
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Expires: 1989-01-28
Abstract
Abstract A vacuum-controlled valve is adapted to cut off the admission of fuel to a carburetor idling jet when the motor vehicle is decelerated and vacuum in the intake manifold is high. The engine thus acts as a brake, and when deceleration takes place to a predetermined extent, the drop in vacuum, that is, increase in pressure in the intake manifold, opens the valve to admit fuel to the carburetor to prevent the motor from stalling.
Inventors
- 👤 Alpha Severn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:28
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/02; F02M3/04; F02M3/05; Y; Y10; Y10S; Y10S261/00; Y10S261/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |