US2731147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic classifier
Assignee: Equipment Engineers Inc
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Filing: 1953-04-24
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Granted: 1956-01-17
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Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
- 👤 Krebs Kellogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:47
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/12; B04C5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN HYDRAULIC CLASSIFYING APPARATUS, A STATIONARY VERTICAL CHAMBER ANNULAR IN SECTION, THE LOWER PORTION OF SAID CHAMBER BEING CONICAL SHAPED, MEANS FOR INTRODUCING HYDROUS SLURRY TO BE CLASSIFIED INTO THE UPPER PORTION OF SAID CHAMBER AND TANGENTIALLY, AND MEANS FOR REMOVING OVERFLOW MATERIAL FROM A REGION LOCATED AXIALLY OF THE CHAMBER AND INTERMEDIATE THE END THEREOF, SAID LAST MEANS INCLUDING TWO CONDUITS AXIALLY ALIGNED WITH THE AXIS OF THE CHAMBER AND HAVING OPPOSITELY FACED ANNULAR INLET ENDS, OF SUBSTANTIALLY THE SAME DIAMETER.
Claim 2
Dependent Claim
82 words
IN HYDRAULIC CLASSIFYING APPARATUS, A STATIONARY VERTICAL CHAMBER ANNULAR IN SECTION, THE LOWER PORTION OF SAID CHAMBER BEING CONICAL SHAPED, MEANS FOR INTRODUCING HYDROUS SLURRY TO BE CLASSIFIED INTO THE UPPER PORTION OF SAID CHAMBER AND TANGENTIALLY, AND MEANS FOR REMOVING OVERFLOW MATERIAL FROM A REGION LOCATED AXIALLY OF THE CHAMBER AND INTERMEDIATE THE END THEREOF, SAID LAST MEANS INCLUDING TWO CONDUITS AXIALLY ALIGNED WITH THE AXIS OF THE CHAMBER AND HAVING OPPOSITELY FACED ANNULAR INLET ENDS, OF SUBSTANTIALLY THE SAME DIAMETER.
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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |