US3221723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder heads for internal combustion engines
Assignee: Motors Liquidation Co
•
Filing: 1964-02-26
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Granted: 1965-12-07
•
Expires: 1984-02-26
Abstract
No abstract record available.
Inventors
- 👤 Williamson Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4285; F02F1/26; F02F1/36; F02F1/38; F02B; F02B1/00; F02B1/02; F02B1/04; F02F2001/244; F02F2001/247; F02F2200/00; F02F2200/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN INTERNAL COMBUSTION ENGINE CYLINDER HEAD HAVING THEREIN AN INLET MANIFOLD, INLET AND EXHAUST PASSAGES, AND PASSAGES FOR THE FLOW OF LIQUID COOLANT THERETHROUGH AND FORMED AS A TWO-PART CASTING, SAID HEAD BEING DIVIDED, SO AS TO FORM AN UPPER AND A LOWER CYLINDER HEAD PART, IN A PLANE WHICH INTERSECTS OPPOSITE SIDES OF THE HEAD AND IS SO SPACED FROM THE UPPER AND LOWER FACES OF THE CYLINDER HEAD THAT SAID EXHAUST PASSAGE LIE WHOLLY WITHIN THE
Claim 2
Dependent Claim
78 words
AN INTERNAL COMBUSTION ENGINE CYLINDER HEAD HAVING THEREIN AN INLET MANIFOLD, INLET AND EXHAUST PASSAGES, AND PASSAGES FOR THE FLOW OF LIQUID COOLANT THERETHROUGH AND FORMED AS A TWO-PART CASTING, SAID HEAD BEING DIVIDED, SO AS TO FORM AN UPPER AND A LOWER CYLINDER HEAD PART, IN A PLANE WHICH INTERSECTS OPPOSITE SIDES OF THE HEAD AND IS SO SPACED FROM THE UPPER AND LOWER FACES OF THE CYLINDER HEAD THAT SAID EXHAUST PASSAGE LIE WHOLLY WITHIN THE
References Cited (Backward Citations)
US2182990A
Cited
US2767694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |