Patent US2569909A successfully refreshed from Google Patents.
US2569909A
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US
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Nonrotary centrifugal separator
Assignee: Power Jets Research and Development Ltd
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Filing: 1949-01-17
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Granted: 1951-10-02
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Expires: 1969-01-17
Abstract
No abstract record available.
Inventors
- 👤 Umney Laurie Edward Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:20
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B04; B04C; B04C3/00; B04C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1875341A
Cited
AT31091B
Cited
US2192214A
Cited
US2115326A
Cited
US2201301A
Cited
US2370629A
Cited
US2506298A
Cited
US2515894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |