US3056743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movement of confined particulate solids
Assignee: Dow Chemical Co
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Filing: 1959-08-19
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Granted: 1962-10-02
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Expires: 1979-08-19
Abstract
No abstract record available.
Inventors
- 👤 Eichhorn Jacob
- 👤 Alfred H Seamster
- 👤 Robert S Beall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:08
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A METHOD OF CONTACTING A LIQUID TO BE TREATED AND A BODY OF WETTED PARTICULATE SOLIDS CONFINED IN A COLUMN HAVING ACCESS TO A CONFINED SOURCE OF SUPPLY OF SAID SOLIDS THROUGH A CONNECTING CHANNEL OF LESS DIAMETER THAN THE COLUMN, AND WHICH EXTENDS FROM THE SOURCE OF SUPPLY TO THE LOWER PART OF SAID COLUMN, AND WHEREIN SAID SOLIDS IN THE COLUMN ARE REQUIRED TO BE MOVED UPWARDLY AS A SUBSTANTIALLY PLUG-FLOW BODY BY THE APPLICATION OF PRESSURE AND SAID SOURCE, THE IMPROVEMENT CONSISTING OF INJECTING A LIQUID MISCIBLE WITH SAID LIQUID TO BE TREATED INTO SAID SOLIDS, AT A RATE OF INJECTION OF SAID LIQUID OF AT LEAST ABOUT 0.5 GALLON PER MINUTE PER SQUARE FOOT OF CROSS-SECTIONAL AREA OF SAID COLUMN, SUBSTANTIALY AT THE PLACE OF ENTRANCE OF THE SOLIDS FROM THE SOURCE OF SUPPLY INTO THE COLUMN AND SUBSTANTIALLY CONCURRENTLY WITH THE APPLICATION OF PRESSURE ON SAID SOURCE OF SUPPLY.
Claim 2
Dependent Claim
155 words
IN A METHOD OF CONTACTING A LIQUID TO BE TREATED AND A BODY OF WETTED PARTICULATE SOLIDS CONFINED IN A COLUMN HAVING ACCESS TO A CONFINED SOURCE OF SUPPLY OF SAID SOLIDS THROUGH A CONNECTING CHANNEL OF LESS DIAMETER THAN THE COLUMN, AND WHICH EXTENDS FROM THE SOURCE OF SUPPLY TO THE LOWER PART OF SAID COLUMN, AND WHEREIN SAID SOLIDS IN THE COLUMN ARE REQUIRED TO BE MOVED UPWARDLY AS A SUBSTANTIALLY PLUG-FLOW BODY BY THE APPLICATION OF PRESSURE AND SAID SOURCE, THE IMPROVEMENT CONSISTING OF INJECTING A LIQUID MISCIBLE WITH SAID LIQUID TO BE TREATED INTO SAID SOLIDS, AT A RATE OF INJECTION OF SAID LIQUID OF AT LEAST ABOUT 0.5 GALLON PER MINUTE PER SQUARE FOOT OF CROSS-SECTIONAL AREA OF SAID COLUMN, SUBSTANTIALY AT THE PLACE OF ENTRANCE OF THE SOLIDS FROM THE SOURCE OF SUPPLY INTO THE COLUMN AND SUBSTANTIALLY CONCURRENTLY WITH THE APPLICATION OF PRESSURE ON SAID SOURCE OF SUPPLY.
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) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |