Patent US2764562A successfully refreshed from Google Patents.
US2764562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonated cation exchange resins and method of making the same
Assignee: Dow Chemical Co
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Filing: 1954-11-02
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Granted: 1956-09-25
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Expires: 1974-11-02
Abstract
No abstract record available.
Inventors
- 👤 Lewis R Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN INSOLUBLE RESINOUS PHOSPHORATED COMPOSITION SUITABLE FOR THE REMOVAL OF CATIONS FROM FLUIDS WHICH COMPRISES AN INSOLUBLE CROSS-LINKED COPOLYMER OF A MIXTURE OF FROM 80 TO 99.5 PER CENT BY WEIGHT OF AT LEAST ONE MONOVINYL AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOVINYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES AND NUCLEAR CHLORINATED DERIVATIVES THEREOF, AND FROM 20 TO 0.5 PER CENT OF A DIVINYL AROMATIC HYDROCARBON, THE SAID COPOLYMER CONTAINING AS SUBSTITUENTS ON THE AROMATIC NUCLEI THEREOF, AT LEAST 1 METHYLENE PHOSPHONATE GROUP PER 10 AROMATIC NUCLEI.
Claim 2
Dependent Claim
89 words
AN INSOLUBLE RESINOUS PHOSPHORATED COMPOSITION SUITABLE FOR THE REMOVAL OF CATIONS FROM FLUIDS WHICH COMPRISES AN INSOLUBLE CROSS-LINKED COPOLYMER OF A MIXTURE OF FROM 80 TO 99.5 PER CENT BY WEIGHT OF AT LEAST ONE MONOVINYL AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOVINYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES AND NUCLEAR CHLORINATED DERIVATIVES THEREOF, AND FROM 20 TO 0.5 PER CENT OF A DIVINYL AROMATIC HYDROCARBON, THE SAID COPOLYMER CONTAINING AS SUBSTITUENTS ON THE AROMATIC NUCLEI THEREOF, AT LEAST 1 METHYLENE PHOSPHONATE GROUP PER 10 AROMATIC NUCLEI.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |