US2591573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous insoluble reaction products of tertiary amines with haloalkylated vinyl aromatic hydrocarbon copolymers
Assignee: Rohm and Haas Co
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Filing: 1947-07-05
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Granted: 1952-04-01
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Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Charles H Mcburney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:55
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
AN INSOLUBLE RESINOUS QUATERNARY AMMONIUM COMPOSITION SUITABLE FOR THE REMOVAL OF ANIONS FROM FLUIDS WHICH COMPRISES THE REACTION PRODUCT OF (1) A HALOMETHYLATED COPOLYMER OF A MAJOR PROPORTION OF A MONOVINYL AROMATIC HYDROCARBON WITH FROM 0.5 TO 20.0% OF A DIVINYL AROMATIC HYDROCARBON, THE SAID COPOLYMER CONT AINING AN AVERAGE OF FROM 0.2 TO 1.2 HALOMETHYL GROUPS PER AROMATIC NUCLEUS, AND (2) A TERTIARY MONOAMINE, THE AMOUNT OF AMINE BEING SUCH THAT THERE IS PRESENT IN THE REACTION MIXTURE AT LEAST ONE MOLECULAR PROPORTION OF SAID TERTIARY AMINE FOR EACH SUBSTITUENT BALOMETHYL HALOMETHYL RADICAL IN THE HALOMETHYLATED COPOLYMER.
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) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |