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US3514167A
Expired / Lapsed
US
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Venturi-type oil seal system for engine crankshafts or the like
Assignee: Caterpillar Inc
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Filing: 1968-07-03
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Granted: 1970-05-26
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Expires: 1988-07-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas V Wahl Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:35
CPC Classifications
F; F01; F01M; F01M11/00; F16; F16J; F16J15/00; F16J15/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1474454A
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US1737870A
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US2575923A
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US2931314A
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US2879867A
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GB888211A
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US3180273A
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US3253882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |