US2531319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine lubricating apparatus
Assignee: Avco Manufacturing Corp
•
Filing: 1945-01-19
•
Granted: 1950-11-21
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Expires: 1965-01-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur T Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:32
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/06; F01M11/062; F01M11/065; F01M1/00; F01M1/12; F01M2001/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT128170B
Cited
US2024336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |