US2799355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal dust separators
Assignee: James Howden and Co Ltd
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Filing: 1953-10-07
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Granted: 1957-07-16
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Expires: 1973-10-07
Abstract
No abstract record available.
Inventors
- 👤 Easton John Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:54
CPC Classifications
B; B04; B04C; B04C11/00; B04C5/00; B04C5/24; B04C5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |