US3252897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying weak electrolytes and nonelectrolytes
Assignee: ChampionX LLC
•
Filing: 1962-05-25
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Granted: 1966-05-24
•
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 00:59
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.
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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) | 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 |