US3073294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum valve
Assignee: Eaton Corp
•
Filing: 1959-07-02
•
Granted: 1963-01-15
•
Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
- 👤 Robert G Brown
- 👤 William S Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:44
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN ALUMINUM VALVE FOR AN INTERNAL COMBUSTION ENGINE HAVING A HEAD PORTION, A BEVELED VALVE FACE ON SAID HEAD PORTION AND A STEM PORTION, SAID HEAD PORTION BEING SHAPED SO AS TO BE STRESSED SUBSTANTIALLY UNIFORMLY THROUGHOUT BY PRESSURES RESULTING FROM COMBUSTION LOADING, AND A CORROSION-RESISTING, COMPRESSION AND CREEPRESISTANT COATING ON THE SURFACE OF SAID VALVE STEM, VALVE FACE AND VALVE HEAD OTHER THAN THE LOWER SURFACE PORTION OF SAID VALVE HEAD.
Claim 2
Dependent Claim
72 words
AN ALUMINUM VALVE FOR AN INTERNAL COMBUSTION ENGINE HAVING A HEAD PORTION, A BEVELED VALVE FACE ON SAID HEAD PORTION AND A STEM PORTION, SAID HEAD PORTION BEING SHAPED SO AS TO BE STRESSED SUBSTANTIALLY UNIFORMLY THROUGHOUT BY PRESSURES RESULTING FROM COMBUSTION LOADING, AND A CORROSION-RESISTING, COMPRESSION AND CREEPRESISTANT COATING ON THE SURFACE OF SAID VALVE STEM, VALVE FACE AND VALVE HEAD OTHER THAN THE LOWER SURFACE PORTION OF SAID VALVE HEAD.
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |