US2521940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of catalyst from olefin polymer product
Assignee: ExxonMobil Oil Corp
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Filing: 1948-05-22
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Granted: 1950-09-12
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Expires: 1968-05-22
Abstract
No abstract record available.
Inventors
- 👤 Dominic J Oriolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:55
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN AN OLEFIN POLYMERIZATION PROCESS WHEREIN THE POLYMERIZATION REACTION IS CATALYZED WITH A METAL HALIDE CATALYST PROMOTED WITH A HYDROGEN HALIDE PROMOTING AGENT, THE IMPROVEMENT IN REMOVING THE CATALYST AND THE PROMOTING AGENT FROM THE POLYMER PRODUCT WHICH COMPRISES ADMIXING AN ALCOHOL WITH THE POLYMER PRODUCT, THEREAFTER ADMIXING WATER WITH THE POLYMER PRODUCT, REMOVING ALCOHOL AND WATER FROM THE POLYMER PRODUCT, AND THEREAFTER WASHING THE POLYMER PRODUCT WITH ADDITIONAL WATER.
Claim 2
Dependent Claim
70 words
IN AN OLEFIN POLYMERIZATION PROCESS WHEREIN THE POLYMERIZATION REACTION IS CATALYZED WITH A METAL HALIDE CATALYST PROMOTED WITH A HYDROGEN HALIDE PROMOTING AGENT, THE IMPROVEMENT IN REMOVING THE CATALYST AND THE PROMOTING AGENT FROM THE POLYMER PRODUCT WHICH COMPRISES ADMIXING AN ALCOHOL WITH THE POLYMER PRODUCT, THEREAFTER ADMIXING WATER WITH THE POLYMER PRODUCT, REMOVING ALCOHOL AND WATER FROM THE POLYMER PRODUCT, AND THEREAFTER WASHING THE POLYMER PRODUCT WITH ADDITIONAL WATER.
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |