US2844546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cation exchange resins having phosphorus acid functional groups and method of preparation thereof
Assignee: Chemical Process Co
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Filing: 1953-04-27
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Granted: 1958-07-22
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Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Irving M Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE METHOD OF PREPARING A WATER INSOLUBLE POLYMERIZATE OF A POLYVINYLARYL COMPOUND CONTAINING A PHOSPHORUS ATOM LINKED TO AN ARYL NUCLEUS AND TO AN IONIZABLE GROUP WHICH COMPRISES TREATING A WATER INSOLUBLE COPOLYMER OF STYRENE AND DIVINYLBENZENE WITH PHOSPHOROUS TRICHLORIDE IN THE PRESENCE OF ALUMINUM CHLORIDE AND HYDROLYZING THE CHLORINE ATOMS ATTACHED TO THE PHOSPHORUS ATOMS OF THE RESULTANT PRODUCT.
Claim 2
Independent Claim
60 words
THE METHOD OF PREPARING A WATER INSOLUBLE POLYMERIZATE OF A POLYVINYLARYL COMPOUND CONTAINING A PHOSPHORUS ATOM LINKED TO AN ARYL NUCLEUS AND TO AN IONIZABLE GROUP WHICH COMPRISES TREATING A WATER INSOLUBLE COPOLYMER OF STYRENE AND DIVINYLBENZENE WITH PHOSPHOROUS TRICHLORIDE IN THE PRESENCE OF ALUMINUM CHLORIDE AND HYDROLYZING THE CHLORINE ATOMS ATTACHED TO THE PHOSPHORUS ATOMS OF THE RESULTANT PRODUCT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |