US2748077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for backwashing the zeolite in a hot lime hot zeolite water softening system
Assignee: Allis Chalmers Corp
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Filing: 1952-10-08
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Granted: 1956-05-29
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Expires: 1972-10-08
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Hodan
- 👤 William M Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:28
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/75
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
183 words
THE METHOD OF TREATING WATER IN A HOT LIME HOT ZEOLITE SOFTENING APPARATUS COMPRISING THE STEPS OF: ESTABLISHING A FLOW OF SAID WATER THROUGH A PLURALITY OF ZONES; ADDING LIME TO SAID WATER IN A LIME SOFTENING ZONE TO PARTIALLY REDUCE THE CARBONATE HARDNESS OF SAID WATER; FILTERING THE LIME SOFTENED WATER IN A FILTERING ZONE; PASSING ONE PART OF THE FILTERED LIME SOFTENED WATER FROM THIE FILTERING ZONE IN THE NORMAL FORWARD DIRECTION THROUGH A FIRST ION EXCHANGE ZEOLITE SOFTENING ZONE TO COMPLETE THE SOFTENING OF SAID PART OF SAID WATER; SIMULTANEOUSLY PASSING THE REMAINDER OF THE LIME SOFTENED WATER THROUGH A SECOND ION EXCHANGE ZEOLITE SOFTENING ZONE IN THE DIRECTION REVERSE OF THE NORMAL FORWARD DIRECTION TO BACKWASH SAID SECOND ION EXCHANGE ZEOLITE SOFTENING ZONE FOR A TIME INTERVAL SUFFICIENT TO ELIMINATE CHANNELS OF NONUNIFORM HYDRAULIC RESISTANCE AND TO CARRY OFF SUSPENDED MATERIAL IN SAID SECOND ZONE; RETURNING A PART OF THE BACKWASH WATER LEAVING SAID SECOND ZONE TO SAID SECOND ION EXCHANGE ZEOLITE SOFTENING ZONE; AND PASSING THE REMAINDER OF SAID BACKWASH WATER THROUGH SAID FIRST ION EXCHANGE SOFTENING ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |