US2956994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of polymerizing ethylene
Assignee: Gelsenberg Benzin AG
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Filing: 1956-01-31
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Granted: 1960-10-18
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Expires: 1976-01-31
Abstract
No abstract record available.
Inventors
- 👤 Peterlein Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:39
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A METHOD OF POLYMERIZING ETHYLENE IN THE PRESENCE OF AN ETHYLENE POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF THE COMBINATION OF AN ORGANOMETALLIC ALUMINUM COMPOUND AND OF A HALIDE OF TITANIUM, COMPRISING THE STEPS OF SUBJECTING ETHYLENE TO POLYMERIZATION IN THE PRESENCE OF SAID POLYMERIZATION CATALYST AND OF AN INERT HYDROCARBON SOLVENT THEREFOR SO AS TO FORM A POLYMERIZED ETHYLENE PORTION, REMOVING SAID SOLVENT UNTIL SAID POLYMERIZED ETHYLENE PORTION IS SUBSTANTIALLY DRY, AND POLYMERIZING ADDITIONAL ETHYLENE IN THE PRESENCE OF SAID POLYMERIZATION CATALYST AND OF SAID DRY POLYMERIZED ETHYLENE ACTING AS CARRIER FOR SAID CATALYST AND PROVIDING CONTACT AND PROMOTING FURTHER POLYMERIZATION, SAID POLYMERIZING BEING CARRIED OUT IN THE ABSENCE OF SOLVENT AND UNDER THOROUGH MIXING OF SAID ADDITIONAL ETHYLENE WITH SAID CATALYST AND WITH SAID DRY POLYMERIZED ETHYLENE ACTING AS CARRIER FOR SAID CATALYST, WHEREBY THE FURTHER POLYMERIZATION PROCEEDS IN SUBSTANTIALLY DRY MANNER TO PRODUCE A PURE POLYMERIZATE OF LOW ASH CONTENT.
Claim 2
Independent Claim
154 words
A METHOD OF POLYMERIZING ETHYLENE IN THE PRESENCE OF AN ETHYLENE POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF THE COMBINATION OF AN ORGANOMETALLIC ALUMINUM COMPOUND AND OF A HALIDE OF TITANIUM, COMPRISING THE STEPS OF SUBJECTING ETHYLENE TO POLYMERIZATION IN THE PRESENCE OF SAID POLYMERIZATION CATALYST AND OF AN INERT HYDROCARBON SOLVENT THEREFOR SO AS TO FORM A POLYMERIZED ETHYLENE PORTION, REMOVING SAID SOLVENT UNTIL SAID POLYMERIZED ETHYLENE PORTION IS SUBSTANTIALLY DRY, AND POLYMERIZING ADDITIONAL ETHYLENE IN THE PRESENCE OF SAID POLYMERIZATION CATALYST AND OF SAID DRY POLYMERIZED ETHYLENE ACTING AS CARRIER FOR SAID CATALYST AND PROVIDING CONTACT AND PROMOTING FURTHER POLYMERIZATION, SAID POLYMERIZING BEING CARRIED OUT IN THE ABSENCE OF SOLVENT AND UNDER THOROUGH MIXING OF SAID ADDITIONAL ETHYLENE WITH SAID CATALYST AND WITH SAID DRY POLYMERIZED ETHYLENE ACTING AS CARRIER FOR SAID CATALYST, WHEREBY THE FURTHER POLYMERIZATION PROCEEDS IN SUBSTANTIALLY DRY MANNER TO PRODUCE A PURE POLYMERIZATE OF LOW ASH CONTENT.
References Cited (Backward Citations)
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GB723169A
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US2825721A
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US2728757A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |