US2515142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange materials
Assignee: Wyeth Holdings LLC
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Filing: 1947-06-02
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Granted: 1950-07-11
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Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 Stroh Grace Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A COMBINATION OF AN ANION ACTIVE, GRANULAR, WATER-INSOLUBLE, RESINOUS REACTION PRODUCT OF EPICHLOROHYDRIN 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 MATERIAL WHICH IS A SULFONATED COAL IN RELATIVE PROPORTIONS BY VOLUME OF 1:3 TO 3:1, AND COMBINATION AFTER STANDING FOR AT LEAST 24 WEEKS HAVING A CAPACITY FOR THE REMOVAAL OF IONIZABLE SOLIDS FROM LIQUID MEDIA OF AT LEAST 7 KILOGRAINS AS CALCIUM CARBONATE PER CUBIC FOOT OF CATION MATERIAL.
Claim 2
Dependent Claim
87 words
A COMBINATION OF AN ANION ACTIVE, GRANULAR, WATER-INSOLUBLE, RESINOUS REACTION PRODUCT OF EPICHLOROHYDRIN 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 MATERIAL WHICH IS A SULFONATED COAL IN RELATIVE PROPORTIONS BY VOLUME OF 1:3 TO 3:1, AND COMBINATION AFTER STANDING FOR AT LEAST 24 WEEKS HAVING A CAPACITY FOR THE REMOVAAL OF IONIZABLE SOLIDS FROM LIQUID MEDIA OF AT LEAST 7 KILOGRAINS AS CALCIUM CARBONATE PER CUBIC FOOT OF CATION MATERIAL.
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) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |