US2586770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable combination of cation-and anion-exchange resins
Assignee: Wyeth Holdings LLC
•
Filing: 1947-06-02
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Granted: 1952-02-26
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Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 Alexander V Alm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
B; B01; B01J; B01J43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A COMBINATION OF AN ANION ACTIVE, GRANULAR, WATER-INSOLUBLE, RESINOUS REACTION PRODUCT OF EPICHLORCHYDRIN AND AN ALKYLENE POLYAMINE IN THE RATIO OF AT LEAST TWO MOLS OF EPICHLOROHYDRIN PER MOL OF POLYAMINE AND A CATION ACTIVE GRANULAR, WATER-INSOLUBLE, RESIN WHICH IS AN ALPHA-FURYL SUBSTITUTED ORGANIC SULFONATE REACTED WITH AND INSOLUBILIZED BY AN ALDEHYDE, SAID COMBINATION AFTER STANDING FOR AT LEAST 24 WEEKS HAVING A CAPACITY FOR THE REMOVAL OF IONIZABLE SOLIDS FROM LIQUID MEDIA OF AT LEAST 7 KILOGRAMS AS CALCIUM CARBONATE PER CUBIC FOOT OF CATION RESIN.
Claim 2
Dependent Claim
87 words
A COMBINATION OF AN ANION ACTIVE, GRANULAR, WATER-INSOLUBLE, RESINOUS REACTION PRODUCT OF EPICHLORCHYDRIN AND AN ALKYLENE POLYAMINE IN THE RATIO OF AT LEAST TWO MOLS OF EPICHLOROHYDRIN PER MOL OF POLYAMINE AND A CATION ACTIVE GRANULAR, WATER-INSOLUBLE, RESIN WHICH IS AN ALPHA-FURYL SUBSTITUTED ORGANIC SULFONATE REACTED WITH AND INSOLUBILIZED BY AN ALDEHYDE, SAID COMBINATION AFTER STANDING FOR AT LEAST 24 WEEKS HAVING A CAPACITY FOR THE REMOVAL OF IONIZABLE SOLIDS FROM LIQUID MEDIA OF AT LEAST 7 KILOGRAMS AS CALCIUM CARBONATE PER CUBIC FOOT OF CATION RESIN.
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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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |