US3198182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve lifter
Assignee: Motors Liquidation Co
•
Filing: 1962-08-17
•
Granted: 1965-08-03
•
Expires: 1982-08-17
Abstract
No abstract record available.
Inventors
- 👤 George H Robinson
- 👤 Edward R Mantel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49247; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958; Y10T428/12972; Y10T428/12986; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A VALVE LIFTER COMPRISING AN INTEGRALLY FORMED FERROUS METAL TUBULAR BODY CLOSED AT ONE END THEREOF TO FORM A BASE AND HAVING A PERIPHERAL RIDGE PROJECTING FROM SAID BASE FORMING A RECESS AND A WEAR-RESISTANT FERROUS ALLOY COATING ON SAID BASE WITHIN SAID RECESS COMPRISING BY WEIGHT 1.5% TO 3.0% CARBON, AT LEAST 2% MOLYBDENUM AND AT LEAST 2% TUNGSTEN, THE SUM OF THE MOLYBDENUM AND TUNGSTEN BEING NOT GREATER THAN 10%, SILICON 0.5% TO 3.0% AND THE BALANCE SUBSTANTIALLY IRON, THE FERROUS METAL BASE UNDERLYING SAID COARING HAVING A CARBURIZED LAYER FORMING A HARD SUPPORT FOR SAID COATING.
References Cited (Backward Citations)
US1628911A
Cited
US1695981A
Cited
US1848083A
Cited
US2562543A
Cited
GB801042A
Cited
US2840063A
Cited
US2845914A
Cited
US2983991A
Cited
US2823992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |