Patent US3176037A successfully refreshed from Google Patents.
US3176037A
Expired / Lapsed
US
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Removal of metal contaminants from polymer solutions
Assignee: Phillips Petroleum Co
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Filing: 1961-01-23
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Granted: 1965-03-30
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Paul F Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/02; C08C2/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A PROCESS FOR THE TREATMENT OF A TERPOLYMER PRODUCED BY SOLUTION POLYMERIZATION OF 1,3 BUTADIENE, STYRENE AND BUTYLMETHACRYLATE IN A HYDROCARBON DILUENT IN THE PRESENCE OF A METALLIC SODIUM CATALYST AND IN WHICH THE RESULTING LIQUID TERPOLYMER IS CARBONATED WITH CO2 TO FORM A CARBOXYLATED POLYMER IN SOLUTION WHICH CONTAINS METALLIC SODIUM AND SODIUM DERIVATIVES AS IMPURITIES, THE IMPROVEMENT WHICH COMPRISES PASSING SAID TERPOLYMER IN SAID SOLUTION IN SAID HYDROCARBON DILUENT THROUGH A BED OF AN ACID REGENRATED ION EXCHANGE RESIN TO REMOVE SAID IMPURITIES, AND RECOVERING SAID TERPOLYMER, SUBSTANTIALLY FREE OF SAID IMPURITIES, AS A PRODUCTI OF THE PROCESS.
Claim 2
Dependent Claim
101 words
IN A PROCESS FOR THE TREATMENT OF A TERPOLYMER PRODUCED BY SOLUTION POLYMERIZATION OF 1,3 BUTADIENE, STYRENE AND BUTYLMETHACRYLATE IN A HYDROCARBON DILUENT IN THE PRESENCE OF A METALLIC SODIUM CATALYST AND IN WHICH THE RESULTING LIQUID TERPOLYMER IS CARBONATED WITH CO2 TO FORM A CARBOXYLATED POLYMER IN SOLUTION WHICH CONTAINS METALLIC SODIUM AND SODIUM DERIVATIVES AS IMPURITIES, THE IMPROVEMENT WHICH COMPRISES PASSING SAID TERPOLYMER IN SAID SOLUTION IN SAID HYDROCARBON DILUENT THROUGH A BED OF AN ACID REGENRATED ION EXCHANGE RESIN TO REMOVE SAID IMPURITIES, AND RECOVERING SAID TERPOLYMER, SUBSTANTIALLY FREE OF SAID IMPURITIES, AS A PRODUCTI OF THE PROCESS.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |