US3139401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing rust from water softeners
Assignee: Hach Co
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Filing: 1962-01-05
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Granted: 1964-06-30
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Expires: 1982-01-05
Abstract
No abstract record available.
Inventors
- 👤 Clifford C Hach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:54
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE PROCESS WHICH COMPRISES PASSAGE OF A LIQUID OVER A BED OF ION EXCHANGE RESIN TO REMOVE METAL ION THEREFROM AND INTERMITTENT REGENERATION OF THE BED OF ION EXCHANGE RESIN BY CONTACT WITH A REGENERATION SOLUTION THE IMPROVEMENT WHEREBY IRON CONTAINING DEPOSITS RESULT ING FROM THE PRESENCE IN SAID LIQUID OF IRON-CONTAINING CONSTITUENTS, ARE REMOVED FROM THE ION EXCHANGE RESIN A THE TIME THE SAME IS REGENERATED WHICH COMPRISES (1) AD MIXING WITH THE REGENERATION SOLUTION A COMPOUND SE LECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALI EARTL METAL SULFITES, BISULFITES, METABISULFITES AND MIXTURES THERE OF AND (2) CONTACTING THE REGENERATION SOLUTION CONTAIN ING SAID COMPOUND WITH A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, MAGNESIUM AND ALLOYS AND MIXTURES THEREOF HAVING SUBSTANTIAL SURFACE AREA PRIOR TO INTRODUCING THE SAME TO THE BED OF ION EXCHANGE RESIN FOR REGENERATION THEREOF.
Claim 2
Dependent Claim
144 words
IN THE PROCESS WHICH COMPRISES PASSAGE OF A LIQUID OVER A BED OF ION EXCHANGE RESIN TO REMOVE METAL ION THEREFROM AND INTERMITTENT REGENERATION OF THE BED OF ION EXCHANGE RESIN BY CONTACT WITH A REGENERATION SOLUTION THE IMPROVEMENT WHEREBY IRON CONTAINING DEPOSITS RESULT ING FROM THE PRESENCE IN SAID LIQUID OF IRON-CONTAINING CONSTITUENTS, ARE REMOVED FROM THE ION EXCHANGE RESIN A THE TIME THE SAME IS REGENERATED WHICH COMPRISES (1) AD MIXING WITH THE REGENERATION SOLUTION A COMPOUND SE LECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALI EARTL METAL SULFITES, BISULFITES, METABISULFITES AND MIXTURES THERE OF AND (2) CONTACTING THE REGENERATION SOLUTION CONTAIN ING SAID COMPOUND WITH A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, MAGNESIUM AND ALLOYS AND MIXTURES THEREOF HAVING SUBSTANTIAL SURFACE AREA PRIOR TO INTRODUCING THE SAME TO THE BED OF ION EXCHANGE RESIN FOR REGENERATION THEREOF.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |