US3240699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upflow regeneration method
Assignee: Union Tank Car Co
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Filing: 1961-11-02
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Granted: 1966-03-15
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Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Duff
- 👤 Salem Eli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF REGENERATING A BED OF ION EXCHANGE MATERIALS WITHIN A CONFINED AREA COMPRISING: (A) BACKWASHING BY FLOWING LIQUID UPWARDLY THROUGH SAID BED THEREBY EXPANDING SAID BED, (B) SETTLING BY DISCONTINUING SAID UPWARD FLOW OF LIQUID THEREBY ALLOWING SAID ION EXCHANGE MATERIALS TO SETTLE WHEREBY SAID BED IS RE-FORMED, (C) FULLY COMPACTING SAID RE-FORMED BED BY RAPIDLY FLOWING LIQUID DOWNWARDLY THROUGH SAID BED, THEN (D) REGENERATING SAID FULLY COMPACTED BED BY FLOWING REGENERANT SOLUTION UPWARDLY THROUGH SAID FULLY COMPACTED BED AT A MODERATE RATE WHILE (I) RESTRAINING SAID FULLY COMPACTED BED AGAINST UPWARD EXPANSION BY MAINTAINING A MECHANICAL BARRIER HAVING AN AREA APPROXIMATELY 20% TO 40% OF THE CORRESPONDING CROSS-SECTIONAL AREA OF SAID FULLY COMPACTED BED IN A PLANE IMMEDIATELY BELOW THE UPPER SURFACE OF SAID FULLY COMPACTED BED, AND (II) DRAWING OFF SAID REGENERANT SOLUTION SUBSTANTIALLY AT SAID PLANE.
Claim 2
Independent Claim
141 words
THE METHOD OF REGENERATING A BED OF ION EXCHANGE MATERIALS WITHIN A CONFINED AREA COMPRISING: (A) BACKWASHING BY FLOWING LIQUID UPWARDLY THROUGH SAID BED THEREBY EXPANDING SAID BED, (B) SETTLING BY DISCONTINUING SAID UPWARD FLOW OF LIQUID THEREBY ALLOWING SAID ION EXCHANGE MATERIALS TO SETTLE WHEREBY SAID BED IS RE-FORMED, (C) FULLY COMPACTING SAID RE-FORMED BED BY RAPIDLY FLOWING LIQUID DOWNWARDLY THROUGH SAID BED, THEN (D) REGENERATING SAID FULLY COMPACTED BED BY FLOWING REGENERANT SOLUTION UPWARDLY THROUGH SAID FULLY COMPACTED BED AT A MODERATE RATE WHILE (I) RESTRAINING SAID FULLY COMPACTED BED AGAINST UPWARD EXPANSION BY MAINTAINING A MECHANICAL BARRIER HAVING AN AREA APPROXIMATELY 20% TO 40% OF THE CORRESPONDING CROSS-SECTIONAL AREA OF SAID FULLY COMPACTED BED IN A PLANE IMMEDIATELY BELOW THE UPPER SURFACE OF SAID FULLY COMPACTED BED, AND (II) DRAWING OFF SAID REGENERANT SOLUTION SUBSTANTIALLY AT SAID PLANE.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |