US2570424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine piston lubrication
Assignee: LEADING ENGINE Co
•
Filing: 1948-08-31
•
Granted: 1951-10-09
•
Expires: 1968-08-31
Abstract
No abstract record available.
Inventors
- 👤 Harry S Benjamin
- 👤 Harte Hallison R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:08
CPC Classifications
F; F01; F01M; F01M9/00; F01M9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1071781A
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US1167970A
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US1151732A
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FR492407A
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US1364102A
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US1552572A
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US1591346A
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US1622687A
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GB269938A
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DE652509C
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US2256601A
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US2250809A
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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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |