US2764560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous reaction products of hexalkylphosphinous triamides and chloromethylated 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
- 👤 Tolkmith Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AN INSOLUBLE RESINOUS QUATERNARY PHOSPHONIUM COMPOSITION SUITABLE FOR THE REMOVAL OF ANIONS FROM FLUIDS, WHICH COMPRISES AN INSOLUBE 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 ON THE AROMATIC NUCLEI SUBSTITUENT GROUPS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
83 words
AN INSOLUBLE RESINOUS QUATERNARY PHOSPHONIUM COMPOSITION SUITABLE FOR THE REMOVAL OF ANIONS FROM FLUIDS, WHICH COMPRISES AN INSOLUBE 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 ON THE AROMATIC NUCLEI SUBSTITUENT GROUPS HAVING THE GENERAL FORMULA:
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 |