Patent US3450228A successfully refreshed from Google Patents.
US3450228A
Expired / Lapsed
US
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Hydraulic valve lifter
Assignee: Motors Liquidation Co
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Filing: 1967-07-19
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Granted: 1969-06-17
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Expires: 1987-07-19
Abstract
No abstract record available.
Inventors
- 👤 Donald E Wortman
- 👤 Barry W Norton
- 👤 Elias W Scheibe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:58
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2857895A
Cited
US3267918A
Cited
US3299870A
Cited
US3280807A
Cited
US3400696A
Cited
US3322104A
Cited
US3379180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |