US2563977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuously acid activating clay
Assignee: Filtrol Corp
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Filing: 1949-12-08
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Granted: 1951-08-14
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Expires: 1969-12-08
Abstract
No abstract record available.
Inventors
- 👤 Lee Van Horn
- 👤 Kahn Leon Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:49
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PROCESS FOR CONTINUOUSLY ACID ACTIVATING CLAY COMPRISING INTRODUCING ADJACENT THE TOP OF A SINGLE, UNOBSTRUCTED REACTION ZONE A STREAM OF CLAY PELLETS AND A STREAM OF CONCENTRATED ACID SOLUTION IN AMOUNTS SUFFICIENT TO ACTIVATE THE CLAY BUT INSUFFICIENT TO MAINTAIN THE LEVEL OF THE LIQUID IN THE REACTION ZONE ABOVE THE LEVEL OF THE PELLETS THEREIN, WITHDRAWING ACTIVATED CLAY AND LIQUID FROM THE LOWER END OF THE REACTION ZONE, THE RATE OF CLAY WITHDRAWAL BEING EQUIVALENT TO PELLET ADDITION TO SAID ZONE, THE RATE OF LIQUID WITHDRAWAL BEING GREATER THAN THAT OF SAID STREAM OF CONCENTRATED ACID AND INTRODUCING A SIDE STREAM COMPRISING A PORTION OF SAID WITHDRAWN LIQUID INTO THE LOWER PORTION OF THE REACTION ZONE IN AN AMOUNT SUFFICIENT TO MAINTAIN THE LIQUID LEVEL IN THE REACTION ZONE ABOVE THE LEVEL OF THE PELLETS THEREIN WITHIN SUBSTANTIAL MIXING BETWEEN SAID SIDE STREAM AND THE ACID ABOVE THE POINT OF INTRODUCTION OF THE SIDE STREAM.
Claim 2
Dependent Claim
157 words
A PROCESS FOR CONTINUOUSLY ACID ACTIVATING CLAY COMPRISING INTRODUCING ADJACENT THE TOP OF A SINGLE, UNOBSTRUCTED REACTION ZONE A STREAM OF CLAY PELLETS AND A STREAM OF CONCENTRATED ACID SOLUTION IN AMOUNTS SUFFICIENT TO ACTIVATE THE CLAY BUT INSUFFICIENT TO MAINTAIN THE LEVEL OF THE LIQUID IN THE REACTION ZONE ABOVE THE LEVEL OF THE PELLETS THEREIN, WITHDRAWING ACTIVATED CLAY AND LIQUID FROM THE LOWER END OF THE REACTION ZONE, THE RATE OF CLAY WITHDRAWAL BEING EQUIVALENT TO PELLET ADDITION TO SAID ZONE, THE RATE OF LIQUID WITHDRAWAL BEING GREATER THAN THAT OF SAID STREAM OF CONCENTRATED ACID AND INTRODUCING A SIDE STREAM COMPRISING A PORTION OF SAID WITHDRAWN LIQUID INTO THE LOWER PORTION OF THE REACTION ZONE IN AN AMOUNT SUFFICIENT TO MAINTAIN THE LIQUID LEVEL IN THE REACTION ZONE ABOVE THE LEVEL OF THE PELLETS THEREIN WITHIN SUBSTANTIAL MIXING BETWEEN SAID SIDE STREAM AND THE ACID ABOVE THE POINT OF INTRODUCTION OF THE SIDE STREAM.
References Cited (Backward Citations)
US1818453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |