US3265053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly
Assignee: Michigan Chrome and Chemical Co
•
Filing: 1965-02-01
•
Granted: 1966-08-09
•
Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charles C Fitzsimons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:15
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/10; F01L2301/00; F01L2820/00; F01L2820/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A LOCKING ASSEMBLY FOR ASSOCIATION WITH THE VALVE STEM OF A VALVE FOR INTERNAL COMBUSTION ENGINES COMPRISING A PAIR OF METALLIC ELEMENTS, EACH OF SAID ELEMENTS HAVING SEMICYLINDRICAL RECESS IN ONE FACE THEREOF, THE EXTERIOR SURFACE OF EACH ELEMENT HAVING A SEMI-FRUSTO CONICAL CONFIGURATION, ALL SURFACES OF SAID ELEMENTS BEING COATED WITH LEAD TO A SUBSTANTIAL THICKNESS.
Claim 2
Dependent Claim
57 words
A LOCKING ASSEMBLY FOR ASSOCIATION WITH THE VALVE STEM OF A VALVE FOR INTERNAL COMBUSTION ENGINES COMPRISING A PAIR OF METALLIC ELEMENTS, EACH OF SAID ELEMENTS HAVING SEMICYLINDRICAL RECESS IN ONE FACE THEREOF, THE EXTERIOR SURFACE OF EACH ELEMENT HAVING A SEMI-FRUSTO CONICAL CONFIGURATION, ALL SURFACES OF SAID ELEMENTS BEING COATED WITH LEAD TO A SUBSTANTIAL THICKNESS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |