US2440883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating system for internalcombustion engines
Assignee: Avco Manufacturing Corp
•
Filing: 1943-02-24
•
Granted: 1948-05-04
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Expires: 1963-02-24
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Wiegman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:54
CPC Classifications
F; F16; F16N; F16N39/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191303647A
Cited
US1891006A
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US1860150A
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US2012613A
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US1999237A
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DE594527C
Cited
US2072180A
Cited
US2268359A
Cited
US2275576A
Cited
FR72319E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |