US2575640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating system for air motors
Assignee: KELLER TOOL CO
•
Filing: 1947-11-08
•
Granted: 1951-11-20
•
Expires: 1967-11-08
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Shaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:55
CPC Classifications
F; F16; F16N; F16N7/00; F16N7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US994400A
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US1809141A
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US1878747A
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US1947430A
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US1956644A
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US2099280A
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US2111583A
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US2238101A
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US2384872A
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US2407613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |