Patent US3149410A successfully refreshed from Google Patents.
US3149410A
Expired / Lapsed
US
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Valve lifter
Assignee: Motors Liquidation Co
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Filing: 1960-11-02
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Granted: 1964-09-22
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Expires: 1980-11-02
Abstract
No abstract record available.
Inventors
- 👤 Dornbos John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:39
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49247
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
THE METHOD OF MAKING A VALVE LIFTER WHICH COMPRISES RELIEVING THE OUTER SURFACE OF ONE END OF A STAINLESS STEEL TUBULAR MEMBER TO SUITABLY CORRESPOND TO AN INNER SURFACE OF ONE END OF A LOW ALLOY STEEL TUBULAR MEMBER, SAID RELIEF FORMING AN ANNULAR SHOULDER ON SAID MEMBER ADJACENT ONE END THEREOF, ASSEMBLING SAID TUBULAR MEMBERS BY INSERTING SAID RELIEVED AREA OF SAID STAINLESS STEEL MEMBER WITHIN THE CORRESPONDING END OF SAID LOW ALLOY STEEL MEMBER AND ABUTTING SAID SHOULDER AGAINST THE END OF SAID ALLOY STEEL MEMBER, BONDING SAID RELIEVED AREA
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |