Patent US2658812A successfully refreshed from Google Patents.
US2658812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve lift recorder
Assignee: Individual
•
Filing: 1949-08-03
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Granted: 1953-11-10
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Expires: 1969-08-03
Abstract
No abstract record available.
Inventors
- 👤 Leonard C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:21
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1631285A
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GB294126A
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US1655615A
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US1890601A
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US2255809A
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US2085203A
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US2212319A
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US2202935A
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US2380704A
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US2381273A
Cited
GB615788A
Cited
US2464612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |