US3170452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat
Assignee: Motors Liquidation Co
•
Filing: 1961-06-28
•
Granted: 1965-02-23
•
Expires: 1981-06-28
Abstract
No abstract record available.
Inventors
- 👤 John M Dobovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A POPPET VALVE SEAL CONSTRUCTION FOR INTERNAL COMBUSTION ENGINES AND THE LIKE COMPRISING A CAST IRON BODY AND A VALVE SEAT INSERT METALLUGICALLY JOINED TO SAID BODY, SAID INSERT BEING A WEAR RESISTANT FERROUS METAL ALLOY DIFFERENT THAN SAID BODY AND CONTAINING SUBSTANTIAL AMOUNTS OF CHROMIUM, SAID INSERT BEING METALLUGICALLY JOINED TO SAID BODY THROUGH A NICKEL BASE BRAZING ALLOY INCLUDING SMALL AMOUNT OF AN ELEMENT TAKEN FROM THE GROUP CONSISTING OF BORON AND SILICON.
Claim 2
Dependent Claim
75 words
A POPPET VALVE SEAL CONSTRUCTION FOR INTERNAL COMBUSTION ENGINES AND THE LIKE COMPRISING A CAST IRON BODY AND A VALVE SEAT INSERT METALLUGICALLY JOINED TO SAID BODY, SAID INSERT BEING A WEAR RESISTANT FERROUS METAL ALLOY DIFFERENT THAN SAID BODY AND CONTAINING SUBSTANTIAL AMOUNTS OF CHROMIUM, SAID INSERT BEING METALLUGICALLY JOINED TO SAID BODY THROUGH A NICKEL BASE BRAZING ALLOY INCLUDING SMALL AMOUNT OF AN ELEMENT TAKEN FROM THE GROUP CONSISTING OF BORON AND SILICON.
References Cited (Backward Citations)
US1961917A
Cited
US2064155A
Cited
US2363673A
Cited
US2550879A
Cited
US2753859A
Cited
US2631577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |