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US2922520A
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Centrifugal wind classifiers
Assignee: SNA Europe Industries AB
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Filing: 1958-03-04
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Granted: 1960-01-26
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Expires: 1978-03-04
Abstract
No abstract record available.
Inventors
- 👤 Gustavsson Karl Axel Goran
- 👤 Mansson Bo Gustav Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:40
CPC Classifications
B; B07; B07B; B07B11/00; B07B11/04; B07B7/00; B07B7/08; B07B7/086
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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |