Patent US3158142A successfully refreshed from Google Patents.
US3158142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase ventilation
Assignee: Individual
•
Filing: 1961-12-05
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Granted: 1964-11-24
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Expires: 1981-12-05
Abstract
No abstract record available.
Inventors
- 👤 George W Bradshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:38
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F01M13/0033; Y; Y10; Y10S; Y10S55/00; Y10S55/19; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7786
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A VENTILATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE, A CARBURETOR CONNECTED IN FLUID-FLOW RELATION TO AN AIR FILTER HOUSING HAVING AN AIR INLET OPENING, THE IMPROVEMENT OF AN AIR MODULATING FLOW CONTROL VALVE CONNECTED TO THE INLET OPENING, AND CONDUIT MEANS CONNECTED AT ONE END INTO THE CRANKCASE AND AT THE OTHER END INTO THE AIR FILTER HOUSING.
Claim 2
Dependent Claim
62 words
IN A VENTILATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE, A CARBURETOR CONNECTED IN FLUID-FLOW RELATION TO AN AIR FILTER HOUSING HAVING AN AIR INLET OPENING, THE IMPROVEMENT OF AN AIR MODULATING FLOW CONTROL VALVE CONNECTED TO THE INLET OPENING, AND CONDUIT MEANS CONNECTED AT ONE END INTO THE CRANKCASE AND AT THE OTHER END INTO THE AIR FILTER HOUSING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |