US3017993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air classification system
Assignee: Aerofall Mills Inc
•
Filing: 1958-12-31
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Granted: 1962-01-23
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Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Macpherson
- 👤 Robert R Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:52
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF SEPARATING A COARSE SOLIDS FRACTION FROM A PRODUCT-LADEN AIRSTREAM COMPRISING A MIXTURE OF COARSE AND FINE PARTICLES EMANATING FROM A GRINDING MILL ZONE WHILE MINIMIZING THE ATTRITION OF SAID COARSE PARTICLES WHICH COMPRISES CONFINING AND CONDUCTING SAID AIRSTREAM IMMEDIATELY EMANATING FROM SAID GRINDING ZONE ALONG AN UNOBSTRUCTED SUBSTANTIALLY STARIGHT LINE PATH OF FLOW TANGENTIALLY DIRECTED TO THE UPPER SIDE OF A ZONE OF CYCLONIC FLOW ABOUT A HORIZONTAL AXIS DISPOSED TRANSVERSELY TO THE DIRECTION OF FLOW OF SAID STREAM, WHEREBY SAID COARSE PARTICLES ARE SELECTIVELY AND CENTRIFUGALLY URGED TO THE OUTER PERIPHERY OF SAID ZONE, COLLECTING SAID COARSE PARTICLES GRAVIMETRICALLY AT THE LOWER PERIPHERY OF SAID ZONE OF CYCLONIC FLOW BELOW THE HORIZONTAL AXIS
Claim 2
Independent Claim
117 words
A METHOD OF SEPARATING A COARSE SOLIDS FRACTION FROM A PRODUCT-LADEN AIRSTREAM COMPRISING A MIXTURE OF COARSE AND FINE PARTICLES EMANATING FROM A GRINDING MILL ZONE WHILE MINIMIZING THE ATTRITION OF SAID COARSE PARTICLES WHICH COMPRISES CONFINING AND CONDUCTING SAID AIRSTREAM IMMEDIATELY EMANATING FROM SAID GRINDING ZONE ALONG AN UNOBSTRUCTED SUBSTANTIALLY STARIGHT LINE PATH OF FLOW TANGENTIALLY DIRECTED TO THE UPPER SIDE OF A ZONE OF CYCLONIC FLOW ABOUT A HORIZONTAL AXIS DISPOSED TRANSVERSELY TO THE DIRECTION OF FLOW OF SAID STREAM, WHEREBY SAID COARSE PARTICLES ARE SELECTIVELY AND CENTRIFUGALLY URGED TO THE OUTER PERIPHERY OF SAID ZONE, COLLECTING SAID COARSE PARTICLES GRAVIMETRICALLY AT THE LOWER PERIPHERY OF SAID ZONE OF CYCLONIC FLOW BELOW THE HORIZONTAL AXIS
References Cited (Backward Citations)
US474490A
Cited
US1620241A
Cited
US1882329A
Cited
FR700177A
Cited
US2270143A
Cited
US2381954A
Cited
US2591043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |