US2507992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of anion exchange resins
Assignee: Amorepacific Corp
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Filing: 1948-06-15
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Granted: 1950-05-16
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Expires: 1968-06-15
Abstract
No abstract record available.
Inventors
- 👤 John H Payne
- 👤 Hugo P Kortschak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:18
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/05; B01J49/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
A PROCESS OF REGENERATING AN AT LEAST PARTIALLY EXHAUSTED ANION EXCHANGE RESIN OF THE AMINE-ALDEHYDE TYPE WHICH COMPRISES PASSING AN AQUEOUS SLURRY OF SOLID CALCIUM HYDROXIDE PARTICLES UPWARDLY THROUGH A POROUS BED OF SAID RESIN UNTIL AT LEAST PARTIAL REGENERATION IS EFFECTED, AND THEN WASHING SAID RESIN BY PASSING WATER THERETHROUGH TO EFFECT THE REMOVAL OF EXCESS CALCIUM HYDROXIDE THEREFROM.
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) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |