US2928815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst residue removal process
Assignee: EIDP Inc
•
Filing: 1956-10-08
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Granted: 1960-03-15
•
Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Hammer George Nelson
- 👤 Uhland Keith Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:41
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR REMOVING CATALYST RESIDUE FROM A LIQUID HYDROCARBON MEDIUM HAVING HYDROCARBON POLYMER DISSOLVED THEREIN, AND CONTAINING KPOLYMERIZATION CATALYST RESIDUE, WHICH COMPRISES EXTRACTING SAID RESIDUE FROM SAID HYDROCARBON MEDIUM BY MEANS OF ETHYLENE GLYCOL AT A TEMPERATURE WITHIN THE RANGE OF 100* TO 300*C., SAID RESIDUE BEING FORMED FROM POLYMERIZATION CATALYST OBTAINED BY REACTION BETWEEN A TRANSISTION ELEMENT HALIDE WHEREIN SAID TRANSISTION ELEMENT IS A METAL OF THE CLASS CONSISTING OF TI, V, W, AND MO, AND A COMPOUND HAVING METAL DIRECTLY ATTACHED TO A MEMBER OF THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON, THE SAID METAL BEING OF THE CLASS CONSISTING OF ALKALI METALS, TIN, MAGNESIUM AND ALUMINUM.
Claim 2
Dependent Claim
110 words
A PROCESS FOR REMOVING CATALYST RESIDUE FROM A LIQUID HYDROCARBON MEDIUM HAVING HYDROCARBON POLYMER DISSOLVED THEREIN, AND CONTAINING KPOLYMERIZATION CATALYST RESIDUE, WHICH COMPRISES EXTRACTING SAID RESIDUE FROM SAID HYDROCARBON MEDIUM BY MEANS OF ETHYLENE GLYCOL AT A TEMPERATURE WITHIN THE RANGE OF 100* TO 300*C., SAID RESIDUE BEING FORMED FROM POLYMERIZATION CATALYST OBTAINED BY REACTION BETWEEN A TRANSISTION ELEMENT HALIDE WHEREIN SAID TRANSISTION ELEMENT IS A METAL OF THE CLASS CONSISTING OF TI, V, W, AND MO, AND A COMPOUND HAVING METAL DIRECTLY ATTACHED TO A MEMBER OF THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON, THE SAID METAL BEING OF THE CLASS CONSISTING OF ALKALI METALS, TIN, MAGNESIUM AND ALUMINUM.
References Cited (Backward Citations)
US2683139A
Cited
BE533362A
Cited
BE544418A
Cited
US2886561A
Cited
US2890214A
Cited
US2868772A
Cited
US2868771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |