US2559529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing sulfate and bicarbonate ions from water
Assignee: Dow Chemical Co
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Filing: 1948-12-29
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Granted: 1951-07-03
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 William C Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/04; B01J41/00; B01J41/04; B01J41/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS, FOR REMOVING SULFATE AND BICARBONATE IONS FROM NEUTRAL AND ALKALINE WATER CONTAINING THE SAME, WHICH COMPRISES PASSING THE WATER THROUGH A BED OF A CHLORIDE OF A WATERINSOLUBLE STRONGLY BASIC ANION EXCHANGE RESIN CONSISTING OF A VINYL-AROMATIC RESIN HAVING A BASIC NITROGEN ATOM OF A QUATERNARY AMMONIUM GROUP ATTACHED TO METHYL RADICALS ON AROMATIC NUCLEI OF THE RESIN.
Claim 2
Dependent Claim
60 words
A PROCESS, FOR REMOVING SULFATE AND BICARBONATE IONS FROM NEUTRAL AND ALKALINE WATER CONTAINING THE SAME, WHICH COMPRISES PASSING THE WATER THROUGH A BED OF A CHLORIDE OF A WATERINSOLUBLE STRONGLY BASIC ANION EXCHANGE RESIN CONSISTING OF A VINYL-AROMATIC RESIN HAVING A BASIC NITROGEN ATOM OF A QUATERNARY AMMONIUM GROUP ATTACHED TO METHYL RADICALS ON AROMATIC NUCLEI OF THE RESIN.
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) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |