Patent US3252897A successfully refreshed from Google Patents.
US3252897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying weak electrolytes and nonelectrolytes
Assignee: ChampionX LLC
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Filing: 1962-05-25
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Granted: 1966-05-24
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Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 James C Hesler
- 👤 Kenneth A Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR REMOVING SALTS OF STRONG ACIDS FROM A SOLUTION CONTAINING FROM ABOUT 0.5% TO ABOUT 5.0% OF SAID SALTS AND CONTAINING FROM 0.5% TO 95% OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF WEAK ELECTROLYTES AND NONELECTROLYTES WHICH COMPRISES: PASSING SAID SOLUTION THROUGH A MIXED RESIN BED COMPRISED OF A CATION EXCHANGER IN THE HYDROGEN FORM AND AN ANION EXCHANGER IN THE SULFATE FORM, SAID ANION EXCHANGER BEING SELECTED FROM THE GROUP CONSISTING OF A STRONGLY BASIC SOLID ANION EXCHANGER AND A WEAKLY BASIC SOLID ANION EXCHANGER.
Claim 2
Dependent Claim
90 words
A PROCESS FOR REMOVING SALTS OF STRONG ACIDS FROM A SOLUTION CONTAINING FROM ABOUT 0.5% TO ABOUT 5.0% OF SAID SALTS AND CONTAINING FROM 0.5% TO 95% OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF WEAK ELECTROLYTES AND NONELECTROLYTES WHICH COMPRISES: PASSING SAID SOLUTION THROUGH A MIXED RESIN BED COMPRISED OF A CATION EXCHANGER IN THE HYDROGEN FORM AND AN ANION EXCHANGER IN THE SULFATE FORM, SAID ANION EXCHANGER BEING SELECTED FROM THE GROUP CONSISTING OF A STRONGLY BASIC SOLID ANION EXCHANGER AND A WEAKLY BASIC SOLID ANION EXCHANGER.
References Cited (Backward Citations)
US2415558A
Cited
US2468471A
Cited
US2461505A
Cited
US2469694A
Cited
US2615924A
Cited
US2702795A
Cited
US2884384A
Cited
US2962438A
Cited
US3090707A
Cited
US3074820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |