US3071566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of ethylene-propylene copolymers
Assignee: Sunoco Inc
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Filing: 1961-04-18
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Granted: 1963-01-01
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Expires: 1981-04-18
Abstract
No abstract record available.
Inventors
- 👤 Richard D Cassar
- 👤 John D Tice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:24
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A POCESS FOR WORKING UP SOLUTIONS OF ETHYLENEPROPYLENE COPOLYMERS WHICH COMPRISES MIXING A SOLUTION OF ETHYLENEE-PROPYLENE COPOLYMER IN A HYDROCARBON SOLVENT, WHICH SOLUTION IS CONTAIMINATED BY A GEL FORMED AS A BYPRODUCT IN HE COPOLYMERIZATION OF ETHYLENE AND PROPYLENE IN THE PRESENCE OF A CATALYST PREPARED BY CONTACTING A METALLIC HALIDE SELECTED FROM THE GROUP CONSISTING OF HALIDES OF A METAL OF GROUPS IVB, VB AND VIB OF THE PERIODIC SYSTEM WITH AN ORGANO-ALUMINUM COMPOUND, WITH WATER CONTAINING A SURFACTANT, AGITATING THE MIXTURE FOR A PERIOD OF TIME TO CAUSE EMULSIFICATION OF THE SOLUTION WITH THE WATER, THE WATER BEING PRESENT IN AN AMOUNT SUFFICIENT TO CAUSE THE SPECIFIC GRAVITY OF THE EMULSION TO EXCEED THAT OF THE GEL, SEPARATING THE GEL FROM THE EMULSION, BREAKING THE EMULSION INTO AN AQUEOUS PHASE AND A HYDROCARBON PHASE, AND RECOVERING ETHYLENE-PROPYLENE COPOLYMER FROM THE HYDROCARBON PHASE.
Claim 2
Dependent Claim
144 words
A POCESS FOR WORKING UP SOLUTIONS OF ETHYLENEPROPYLENE COPOLYMERS WHICH COMPRISES MIXING A SOLUTION OF ETHYLENEE-PROPYLENE COPOLYMER IN A HYDROCARBON SOLVENT, WHICH SOLUTION IS CONTAIMINATED BY A GEL FORMED AS A BYPRODUCT IN HE COPOLYMERIZATION OF ETHYLENE AND PROPYLENE IN THE PRESENCE OF A CATALYST PREPARED BY CONTACTING A METALLIC HALIDE SELECTED FROM THE GROUP CONSISTING OF HALIDES OF A METAL OF GROUPS IVB, VB AND VIB OF THE PERIODIC SYSTEM WITH AN ORGANO-ALUMINUM COMPOUND, WITH WATER CONTAINING A SURFACTANT, AGITATING THE MIXTURE FOR A PERIOD OF TIME TO CAUSE EMULSIFICATION OF THE SOLUTION WITH THE WATER, THE WATER BEING PRESENT IN AN AMOUNT SUFFICIENT TO CAUSE THE SPECIFIC GRAVITY OF THE EMULSION TO EXCEED THAT OF THE GEL, SEPARATING THE GEL FROM THE EMULSION, BREAKING THE EMULSION INTO AN AQUEOUS PHASE AND A HYDROCARBON PHASE, AND RECOVERING ETHYLENE-PROPYLENE COPOLYMER FROM THE HYDROCARBON PHASE.
References Cited (Backward Citations)
US3009891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |