US2855364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upelow regeneration with porous tube
Assignee: Dorr Oliver Inc
•
Filing: 1956-12-14
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Granted: 1958-10-07
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Expires: 1976-12-14
Abstract
No abstract record available.
Inventors
- 👤 Elliott J Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:25
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF ION EXCHANGE TREATMENT OF A WORKING SOLUTION PASSING THROUGH A BED OF GRANULAR ION EXCHANGE MATERIAL IN AN ION EXCHANGE TREATMENT CELL, WHICH COMPRISES (A) EXHAUSTING THE BED BY THE PASSAGE THERETHROUGH OF THE WORKING SOLUTION DOWNWARD WHILE THE BED REMAINS SUBSIDED, (B) BACKWASHING THE BED BY AN UPFLOW OF WASH WATER THERETHROUGH AT HIGH ENOUGH VELOCITY TO EXPAND THE BED INTO A STATE OF TEETER AND WHEN BACKWASHING IS COMPLETED ALLOWING THE BED TO SUBSIDE, (C) REGENERATING THE BED BY UPFLOW PASSAGE THERETHROUGH OF REGENERANT SOLUTION WHILE IN SUBSIDENCE, (D) AFTER REGENERATION IS COMPLETED RINSING THE BED TO DISPLACE RESIDUAL REGENERANT SOLUTION THEREFROM, BY PASSING THERETHROUGH AN UPFLOW OF RINSE WATER WHILE MAINTAINING SUBSIDENCE, CHARACTERIZED THEREBY THAT SAID UPFLOWING REGENERANT SOLUTION IS WITHDRAWN AT A PREDETERMINED ELEVATION SPACED DOWNWARDLY FROM THE TOP LEVEL OF THE BED WHILE AIR PRESSURE IS AP-
Claim 2
Independent Claim
145 words
THE METHOD OF ION EXCHANGE TREATMENT OF A WORKING SOLUTION PASSING THROUGH A BED OF GRANULAR ION EXCHANGE MATERIAL IN AN ION EXCHANGE TREATMENT CELL, WHICH COMPRISES (A) EXHAUSTING THE BED BY THE PASSAGE THERETHROUGH OF THE WORKING SOLUTION DOWNWARD WHILE THE BED REMAINS SUBSIDED, (B) BACKWASHING THE BED BY AN UPFLOW OF WASH WATER THERETHROUGH AT HIGH ENOUGH VELOCITY TO EXPAND THE BED INTO A STATE OF TEETER AND WHEN BACKWASHING IS COMPLETED ALLOWING THE BED TO SUBSIDE, (C) REGENERATING THE BED BY UPFLOW PASSAGE THERETHROUGH OF REGENERANT SOLUTION WHILE IN SUBSIDENCE, (D) AFTER REGENERATION IS COMPLETED RINSING THE BED TO DISPLACE RESIDUAL REGENERANT SOLUTION THEREFROM, BY PASSING THERETHROUGH AN UPFLOW OF RINSE WATER WHILE MAINTAINING SUBSIDENCE, CHARACTERIZED THEREBY THAT SAID UPFLOWING REGENERANT SOLUTION IS WITHDRAWN AT A PREDETERMINED ELEVATION SPACED DOWNWARDLY FROM THE TOP LEVEL OF THE BED WHILE AIR PRESSURE IS AP-
References Cited (Backward Citations)
US2268607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |