Patent US3137284A successfully refreshed from Google Patents.
US3137284A
Expired / Lapsed
US
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Crank case ventilating system and air cleaner means
Assignee: Champion Laboratories Inc
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Filing: 1963-03-13
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Granted: 1964-06-16
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Expires: 1983-03-13
Abstract
No abstract record available.
Inventors
- 👤 William H Hultgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F02; F02M; F02M35/00; F02M35/02; F02M35/04; F02B; F02B2275/00; F02B2275/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN COMBINATION, AN INTERNAL COMBUSTION ENGINE WITH CRANKCASE CHAMBER MEANS, AIR CLEANER MEANS FOR FILTERING AIR SUPPLIED TO THE INTERNAL COMBUSTION ENGINE CONDUIT MEANS COMMUNICATING WITH THE CRANKCASE CHAMBER MEANS AND SAID AIR CLEANER MEANS FOR RETURNING BLOW-BY GASES TO THE ENGINE SAID AIR CLEANER MEANS INCLUDING A PAPER FILTER ELEMENT TREATED WITH AN ALEOPHOBIC FLUORO-
Claim 2
Dependent Claim
56 words
IN COMBINATION, AN INTERNAL COMBUSTION ENGINE WITH CRANKCASE CHAMBER MEANS, AIR CLEANER MEANS FOR FILTERING AIR SUPPLIED TO THE INTERNAL COMBUSTION ENGINE CONDUIT MEANS COMMUNICATING WITH THE CRANKCASE CHAMBER MEANS AND SAID AIR CLEANER MEANS FOR RETURNING BLOW-BY GASES TO THE ENGINE SAID AIR CLEANER MEANS INCLUDING A PAPER FILTER ELEMENT TREATED WITH AN ALEOPHOBIC FLUORO-
References Cited (Backward Citations)
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Cited
US2633113A
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US2895868A
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US2936855A
Cited
US2973832A
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US3053762A
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |