US3045002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining a purified polyolefin from a polyolefin dispersion
Assignee: Hoechst AG
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Filing: 1958-12-29
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Granted: 1962-07-17
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Sommer Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:32
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A PROCESS FOR OBTAINING A PURIFIED ZIEGLER POLYOLEFIN FROM A ZIEGLER POLYOLEFIN DISPERSION CONTAINING A HYDROCARBON AS DISPERSING MEDIUM WHICH DISPERSION IS OBTAINED BY POLYMERIZING A MONOOLEFIN IN THE PRESENCE OF A CATALYST OF AN ALKYL ALUMINUM COMPOUND AND A CHLORIDE OF A HEAVY METAL SUBGROPS OF IV-VIII OF THE PERIODIC TABLE, THE IMPROVEMENT WHICH COMPRISES TREATING SAID DISPERSION AT A TEMPERATURE IN THE RANGE FROM 30-100*C. WITH AN ETHER SELECTED FROM THE GROUP CONSISTING OF A MONOETHER OF A MONOHYDRIC ALCOHOL OF 1-8 CARBON ATOMS WITH A GLYCOL CONTAINING UP TO 8 CARBON ATOMS AND A DIETHER OF MONOHYDRIC ALCOHOL OF 1-8 CARBON ATOMS WITH GLYCEROL, IN AN AMOUNT OF 0.2-5%, CALCULATED ON THE DISPERSING MEDIUM, AND THEN ADDING WATER THERETO, FILTERING THE POLYMER DISPERSION, AND STEAM-DISTILLING THE WET POLYMER.
Claim 2
Dependent Claim
132 words
IN A PROCESS FOR OBTAINING A PURIFIED ZIEGLER POLYOLEFIN FROM A ZIEGLER POLYOLEFIN DISPERSION CONTAINING A HYDROCARBON AS DISPERSING MEDIUM WHICH DISPERSION IS OBTAINED BY POLYMERIZING A MONOOLEFIN IN THE PRESENCE OF A CATALYST OF AN ALKYL ALUMINUM COMPOUND AND A CHLORIDE OF A HEAVY METAL SUBGROPS OF IV-VIII OF THE PERIODIC TABLE, THE IMPROVEMENT WHICH COMPRISES TREATING SAID DISPERSION AT A TEMPERATURE IN THE RANGE FROM 30-100*C. WITH AN ETHER SELECTED FROM THE GROUP CONSISTING OF A MONOETHER OF A MONOHYDRIC ALCOHOL OF 1-8 CARBON ATOMS WITH A GLYCOL CONTAINING UP TO 8 CARBON ATOMS AND A DIETHER OF MONOHYDRIC ALCOHOL OF 1-8 CARBON ATOMS WITH GLYCEROL, IN AN AMOUNT OF 0.2-5%, CALCULATED ON THE DISPERSING MEDIUM, AND THEN ADDING WATER THERETO, FILTERING THE POLYMER DISPERSION, AND STEAM-DISTILLING THE WET POLYMER.
References Cited (Backward Citations)
US2841574A
Cited
US2887473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |