US3120221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic valve return for internal combustion engines
Assignee: Individual
•
Filing: 1962-02-13
•
Granted: 1964-02-04
•
Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Lyons Jim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/46; F01L1/462; F01L1/465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
PNEUMATIC VALVE RETURN MEANS FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING: A CYLINDER HEAD; A VALVE SEAT IN SAID HEAD; A VALVE AXIALLY SLIDABLY MOUNTED RELATIVE TO SAID SEAT AND HAVING A HEAD PORTION TO FIT CLOSELY IN THE SEAT; A CYLINDER IN SAID HEAD; SAID VALVE HAVING A STEM EXTENDING AXIALLY INTO SAID CYLINDER; A LIFTING PISTON SECURED TO SAID STEM AND BEING SLIDABLE IN SAID CYLINDER:
Claim 2
Dependent Claim
67 words
PNEUMATIC VALVE RETURN MEANS FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING: A CYLINDER HEAD; A VALVE SEAT IN SAID HEAD; A VALVE AXIALLY SLIDABLY MOUNTED RELATIVE TO SAID SEAT AND HAVING A HEAD PORTION TO FIT CLOSELY IN THE SEAT; A CYLINDER IN SAID HEAD; SAID VALVE HAVING A STEM EXTENDING AXIALLY INTO SAID CYLINDER; A LIFTING PISTON SECURED TO SAID STEM AND BEING SLIDABLE IN SAID CYLINDER:
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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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |