Patent US2619593A successfully refreshed from Google Patents.
US3425937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demineralization of water
Assignee: Individual
•
Filing: 1966-05-25
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Granted: 1969-02-04
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Donald Eric Weiss
- 👤 Brian Alfred Bolto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:54
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A PROCESS FOR THE DEMINERALIZATION OF WATER USING A MIXED BED OF ION-EXCHANGE RESINS OF THE WEAK ELECTROLYTE TYPE IN WHICH THE MIXED RESIN BED COMPRISES A WEAK BASE RESIN AND A WEAK ACID RESIN AND IS REGENERATED BY ELUTION WITH WATER OR SALINE AQUEOUS SOLUTIONS AT A TEMPERATURE EXCEEDING THAT EMPLOYED IN THE ADSORPTION STAGE AND IN WHICH THE WEAK BASE RESIN HAS A TITRATION CURVE WHICH IS DISPLACED TO A MORE ACID POSITION BY ELEVATION OF TEMPERATURE AND THE WEAK ACID RESIN HAS A TITRATION CURVE AT THE TEMPERATURE OF THE ADSORPTION STAGE SUCH THAT SOME PORTION OF IT FALLS WITHIN THE AREA DEFINED BY THE TITRATION CURVES OF THE WEAK BASE RESIN AT THE TEMPERATURES, RESPECTIVELY, OF THE ADSORPTION AND ELUTION STAGES, THE IMPROVEMENT WHICH COMPRISES ADJUSTING THE PH OF THE WATER IN EQUILIBRIUM WITH THE RESIN BED DURING ADSORPTION AND CHOOSING A RATIO OF ACID RESIN TO BASE RESIN SUCH AS TO MAXIMIZE THE OVERLAP OF THE ACID AND BASE TITRATION CURVES.
Claim 2
Dependent Claim
167 words
IN A PROCESS FOR THE DEMINERALIZATION OF WATER USING A MIXED BED OF ION-EXCHANGE RESINS OF THE WEAK ELECTROLYTE TYPE IN WHICH THE MIXED RESIN BED COMPRISES A WEAK BASE RESIN AND A WEAK ACID RESIN AND IS REGENERATED BY ELUTION WITH WATER OR SALINE AQUEOUS SOLUTIONS AT A TEMPERATURE EXCEEDING THAT EMPLOYED IN THE ADSORPTION STAGE AND IN WHICH THE WEAK BASE RESIN HAS A TITRATION CURVE WHICH IS DISPLACED TO A MORE ACID POSITION BY ELEVATION OF TEMPERATURE AND THE WEAK ACID RESIN HAS A TITRATION CURVE AT THE TEMPERATURE OF THE ADSORPTION STAGE SUCH THAT SOME PORTION OF IT FALLS WITHIN THE AREA DEFINED BY THE TITRATION CURVES OF THE WEAK BASE RESIN AT THE TEMPERATURES, RESPECTIVELY, OF THE ADSORPTION AND ELUTION STAGES, THE IMPROVEMENT WHICH COMPRISES ADJUSTING THE PH OF THE WATER IN EQUILIBRIUM WITH THE RESIN BED DURING ADSORPTION AND CHOOSING A RATIO OF ACID RESIN TO BASE RESIN SUCH AS TO MAXIMIZE THE OVERLAP OF THE ACID AND BASE TITRATION CURVES.
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |