US2671058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of acid activated clay
Assignee: Filtrol Corp
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Filing: 1951-07-21
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Granted: 1954-03-02
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Expires: 1971-07-21
Abstract
No abstract record available.
Inventors
- 👤 Grant A Mickelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A PROCESS FOR ACID ACTIVATING AN ACID ACTIVATABLE CLAY IN WHICH RAW UNCALCINED CLAY IN THE FORM OF PELLETS OF SUBSTANTIALLY UNIFORM SIZE AND SHAPE IS TREATED WITH A MINERAL ACID AND THEREAFTER IS WASHED TO REMOVE SOLUBLE SALTS AND EXCESS ACID AND DRIED, THE IMPROVEMENT OF HARDENING THE PELLETS SUFFICIENT TO PREVENT BREAKDOWN OF SAID PELLETS DURING ACID ACTIVATION OF THE CLAY WITH THE MINERAL ACID AND ALSO DURING WASHING F THE ACTIVATED CLAY WHICH COMPRISES MIXING WITH THE RAW UNPELLETED CLAY 5 TO 30 WEIGHT PER CENT OF MINERAL ACID BASED ON THE VOLATILE FREE RING WEIGHT OF THE CLAY, PELLETING THE CLAY-ACID MIXTURE, AND TREATING THE PELLETED UNCALCINED CLAYACID MIXTURE WITH AN ADDITIONAL AMOUNT OF MINERAL ACID SUFFICIENT TO BRING ABOUT ACID ACTIVATION OF THE PELLETED CLAY.
Claim 2
Dependent Claim
131 words
IN A PROCESS FOR ACID ACTIVATING AN ACID ACTIVATABLE CLAY IN WHICH RAW UNCALCINED CLAY IN THE FORM OF PELLETS OF SUBSTANTIALLY UNIFORM SIZE AND SHAPE IS TREATED WITH A MINERAL ACID AND THEREAFTER IS WASHED TO REMOVE SOLUBLE SALTS AND EXCESS ACID AND DRIED, THE IMPROVEMENT OF HARDENING THE PELLETS SUFFICIENT TO PREVENT BREAKDOWN OF SAID PELLETS DURING ACID ACTIVATION OF THE CLAY WITH THE MINERAL ACID AND ALSO DURING WASHING F THE ACTIVATED CLAY WHICH COMPRISES MIXING WITH THE RAW UNPELLETED CLAY 5 TO 30 WEIGHT PER CENT OF MINERAL ACID BASED ON THE VOLATILE FREE RING WEIGHT OF THE CLAY, PELLETING THE CLAY-ACID MIXTURE, AND TREATING THE PELLETED UNCALCINED CLAYACID MIXTURE WITH AN ADDITIONAL AMOUNT OF MINERAL ACID SUFFICIENT TO BRING ABOUT ACID ACTIVATION OF THE PELLETED CLAY.
References Cited (Backward Citations)
US2551580A
Cited
US2582956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |