Patent US4209781A successfully refreshed from Google Patents.
Patent US3108581A successfully refreshed from Google Patents.
US3108581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase pressure controller
Assignee: Johnson Products Inc
•
Filing: 1962-01-22
•
Granted: 1963-10-29
•
Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 John W Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:47
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN ENGINE ASSEMBLY COMPRISING: AN INTERNAL COMBUSTION ENGINE INCLUDING A CRANKCASE AND INTAKE MANIFOLD MEANS; SAID CRANKCASE BEING SEALED TO THE ATMOSPHERE; CONDUIT MEANS EXTENDING BETWEEN SAID CRANKCASE AND SAID MANIFOLD; A FLOW REGULATOR IN SAID CONDUIT MEANS; SAID REGULATOR BEING UNRESPONSIVE TO VACUUM CONDITIONS IN SAID MANIFOLD, AND BEING RESPONSIVE SOLELY TO GASEOUS PRESSURE IN SAID CRANKCASE OVER A STANDARD PRESSURE TO OPEN AND EXHAUST SAID GASES TO SAID MANIFOLD AND TO CLOSE AGAIN AFTER SAID EXHAUST.
Claim 2
Dependent Claim
78 words
AN ENGINE ASSEMBLY COMPRISING: AN INTERNAL COMBUSTION ENGINE INCLUDING A CRANKCASE AND INTAKE MANIFOLD MEANS; SAID CRANKCASE BEING SEALED TO THE ATMOSPHERE; CONDUIT MEANS EXTENDING BETWEEN SAID CRANKCASE AND SAID MANIFOLD; A FLOW REGULATOR IN SAID CONDUIT MEANS; SAID REGULATOR BEING UNRESPONSIVE TO VACUUM CONDITIONS IN SAID MANIFOLD, AND BEING RESPONSIVE SOLELY TO GASEOUS PRESSURE IN SAID CRANKCASE OVER A STANDARD PRESSURE TO OPEN AND EXHAUST SAID GASES TO SAID MANIFOLD AND TO CLOSE AGAIN AFTER SAID EXHAUST.
References Cited (Backward Citations)
US675704A
Cited
US2775960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |