US2764564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous reaction products of phosphorus thiochloride and insoluble cross-linked vinyl aromatic copolymers
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
- 👤 Elmer L Mcmaster
- 👤 William K Glesner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:24
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN INSOLUBLE RESINOUS THIOPHOSPHORATED 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 HYDROCARBON OF THE BENZENE SERIES AND FROM 20 TO 0.5 PER CENT OF A DIVINYL AROMATIC HYDROCARBON, THE SAID COPOLYMER CONTAINING AS SUBSTITUENTS ON THE AROMATIC NUCLEI THEROF, AT LEAST ONE THIOPHOSPHONATE GROUP PER 10 AROMATIC NUCLEI.
Claim 2
Dependent Claim
74 words
AN INSOLUBLE RESINOUS THIOPHOSPHORATED 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 HYDROCARBON OF THE BENZENE SERIES AND FROM 20 TO 0.5 PER CENT OF A DIVINYL AROMATIC HYDROCARBON, THE SAID COPOLYMER CONTAINING AS SUBSTITUENTS ON THE AROMATIC NUCLEI THEROF, AT LEAST ONE THIOPHOSPHONATE 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 |