US2769787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for regeneration of cation exchangers
Assignee: Morton Salt Co
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Filing: 1954-06-04
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Granted: 1956-11-06
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Horace W Diamond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:39
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/50; B01J49/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF REGENERATING A RESINOUS SULFONATED COPOLYMER OF STYRENE AND DIVINLYBENZENE THAT HAS A SUBSTANTIALLY EXHAUSTED SOFTENING CAPACITY AS A RESULT OF TREATING HARE WATER, WHHIC COMPRISES CONTACTING SAID EXHAUSTED RESINOUS COPOLYER WITH AN AQUEOUS SOLUTION OF A COMPOSITION COMPRISING A MAJOR PORTION OF SODIUM CHLORIDE AND A MINOR PORTION OF A SOLID WATER-SOLUBLE ACID SELECTED FROM THE GROUP CONSISTING OF CITRIC, TARTARIC, SULFAMIC, SULFOSALICYLIC, MALIC, MALEIC, SUCCINIC AND ITACONIC ACIDS.
Claim 2
Independent Claim
72 words
A METHOD OF REGENERATING A RESINOUS SULFONATED COPOLYMER OF STYRENE AND DIVINLYBENZENE THAT HAS A SUBSTANTIALLY EXHAUSTED SOFTENING CAPACITY AS A RESULT OF TREATING HARE WATER, WHHIC COMPRISES CONTACTING SAID EXHAUSTED RESINOUS COPOLYER WITH AN AQUEOUS SOLUTION OF A COMPOSITION COMPRISING A MAJOR PORTION OF SODIUM CHLORIDE AND A MINOR PORTION OF A SOLID WATER-SOLUBLE ACID SELECTED FROM THE GROUP CONSISTING OF CITRIC, TARTARIC, SULFAMIC, SULFOSALICYLIC, MALIC, MALEIC, SUCCINIC AND ITACONIC ACIDS.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |