US2792172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal filters
Assignee: Federal Mogul Engineering Ltd
•
Filing: 1954-02-23
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Granted: 1957-05-14
•
Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Tait William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:14
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/005; F; F01; F01M; F01M1/00; F01M1/10; F01M2001/1028; F01M2001/1035; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US791703A
Cited
US1145900A
Cited
US1714658A
Cited
US2087778A
Cited
AU2205535A
Cited
US2650022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |