US2473701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant filtering system
Assignee: Individual
•
Filing: 1944-12-15
•
Granted: 1949-06-21
•
Expires: 1964-12-15
Abstract
No abstract record available.
Inventors
- 👤 Giles E Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:15
CPC Classifications
F; F16; F16N; F16N39/00; F16N39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678272A
Cited
US1618870A
Cited
FR607994A
Cited
FR630986A
Cited
US1868814A
Cited
US1862724A
Cited
US2028826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |