Patent US3308951A successfully refreshed from Google Patents.
US3308951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary hindered settling column for hydrosizers
Assignee: ConocoPhillips Co
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Filing: 1964-12-03
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Granted: 1967-03-14
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Expires: 1984-12-03
Abstract
No abstract record available.
Inventors
- 👤 Robert D Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:29
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/623
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN APPARATUS FOR HYDRAULICALLY CLASSIFYING PARTICLES HAVING A RANGE OF SIZES, THE COMBINATION OF A FIRST VERTICALLY DISPOSED COLUMN, A FIRST CHAMBER POSITIONED BENEATH THE FIRST COLUMN OF LARGER CROSS-SECTIONAL AREA THAN SAID FIRST COLUMN AND COMMUNICATING THEREWITH, A SECOND VERTICALLY DISPOSED COLUMN OF SMALLER CROSS-SECTIONAL AREA THAN SAID FIRST COLUMN POSITIONED BENEATH SAID FIRST CHAMBER AND COMMUNICATING THEREWITH, A SECOND CHAMBER POSITIONED BENEATH THE SECOND COLUMN OF LARGER CROSS-SECTIONAL AREA THAN SAID SECOND COLUMN AND COMMUNICATING THEREWITH, SAID COLUMNS AND SAID CHAMBERS BEING FILLED WITH A LIQUID, MEANS FOR SEPARATELY INTRODUCING LIQUID INTO EACH OF SAID FIRST AND SECOND CHAMBERS AT RATES SUCH THAT THERE IS EF-
Claim 2
Dependent Claim
108 words
IN APPARATUS FOR HYDRAULICALLY CLASSIFYING PARTICLES HAVING A RANGE OF SIZES, THE COMBINATION OF A FIRST VERTICALLY DISPOSED COLUMN, A FIRST CHAMBER POSITIONED BENEATH THE FIRST COLUMN OF LARGER CROSS-SECTIONAL AREA THAN SAID FIRST COLUMN AND COMMUNICATING THEREWITH, A SECOND VERTICALLY DISPOSED COLUMN OF SMALLER CROSS-SECTIONAL AREA THAN SAID FIRST COLUMN POSITIONED BENEATH SAID FIRST CHAMBER AND COMMUNICATING THEREWITH, A SECOND CHAMBER POSITIONED BENEATH THE SECOND COLUMN OF LARGER CROSS-SECTIONAL AREA THAN SAID SECOND COLUMN AND COMMUNICATING THEREWITH, SAID COLUMNS AND SAID CHAMBERS BEING FILLED WITH A LIQUID, MEANS FOR SEPARATELY INTRODUCING LIQUID INTO EACH OF SAID FIRST AND SECOND CHAMBERS AT RATES SUCH THAT THERE IS EF-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |