Patent US3073725A successfully refreshed from Google Patents.
US3073725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange processes
Assignee: Individual
•
Filing: 1960-12-01
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Granted: 1963-01-15
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Expires: 1980-12-01
Abstract
No abstract record available.
Inventors
- 👤 Popper Karel
- 👤 Slamccka Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:31
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS OF REMOVING CATIONIC AND ANIONIC CONTAMINANTS FROM A LIQUID, WHICH COMPRISES ESTABLISHING ION EXCHANGE CONTACT BETWEEN THE LIQUID AND CATION AND ANION EXCHANGE MATERIAL REGENERATED WITH AN ALKALINE EARTH METAL AND HYDROXYL, RESPECTIVELY, THEREBY TO EXCHANGE THE CATIONIC CONTAMINANTS FOR ALKALINE EARTH METAL AND THE ANIONIC CONTAMINANTS FOR HYDROXYL, PRECIPITATING THE ALKALINE EARTH METAL, AND REMOVING THE PRECIPITATE FROM THE LIQUID.
Claim 2
Dependent Claim
63 words
A PROCESS OF REMOVING CATIONIC AND ANIONIC CONTAMINANTS FROM A LIQUID, WHICH COMPRISES ESTABLISHING ION EXCHANGE CONTACT BETWEEN THE LIQUID AND CATION AND ANION EXCHANGE MATERIAL REGENERATED WITH AN ALKALINE EARTH METAL AND HYDROXYL, RESPECTIVELY, THEREBY TO EXCHANGE THE CATIONIC CONTAMINANTS FOR ALKALINE EARTH METAL AND THE ANIONIC CONTAMINANTS FOR HYDROXYL, PRECIPITATING THE ALKALINE EARTH METAL, AND REMOVING THE PRECIPITATE FROM THE LIQUID.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |