US2924591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of high molecular weight ethylene polymers
Assignee: Ruhrchemie AG
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Filing: 1955-10-26
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Granted: 1960-02-09
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Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 Roelen Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:24
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR THE PRODUCTION OF ETHYLENE POLYMERS FROM ETHYLENE-CONTAINING GASES BY MEANS OF POLYMERIZATION CATALYSTS AT GAS PRESSURES BELOW 200KG./CM.2, EFFECTING THE POLYMERIZATION OF ETHYLENE IN A DRY PHASE AND AT TEMPERATURES RANGING BELOW THE CAKING AND SINTERING TEMPERATURE OF THE POLYMERS WITHIN A MIXTURE OF SOLID AND LIQUID POLYMERIZATION CATALYSTS AND REACTION POLYMERS, SAID POLYMERS BEING IN POWDER AND GRANULAR FORM, BEING CONTINUALY SUBDIVIDED MECHANICALLY AND BEING AGITATED IN SUCH A MANNER THAT ALL COMPONENTS OF THE MIXTURE REACT WITH THE ETHYLENE CONSTANTLY AND WITH AS LITTLE OBSTRUCTION AS POSSIBLE, SAID PROCESS COMPRISING THE ADDITION OF TITANIUM TETRACHLORIDE AND AN ALUMINUM DIA MOLAR RATIO OF 1:1, WHEREBY ETHYLENE POLYMERS ARE FORMED HAVING MOLECULAR WEIGHTS OF 10,000 TO 100,000.
Claim 2
Dependent Claim
120 words
A PROCESS FOR THE PRODUCTION OF ETHYLENE POLYMERS FROM ETHYLENE-CONTAINING GASES BY MEANS OF POLYMERIZATION CATALYSTS AT GAS PRESSURES BELOW 200KG./CM.2, EFFECTING THE POLYMERIZATION OF ETHYLENE IN A DRY PHASE AND AT TEMPERATURES RANGING BELOW THE CAKING AND SINTERING TEMPERATURE OF THE POLYMERS WITHIN A MIXTURE OF SOLID AND LIQUID POLYMERIZATION CATALYSTS AND REACTION POLYMERS, SAID POLYMERS BEING IN POWDER AND GRANULAR FORM, BEING CONTINUALY SUBDIVIDED MECHANICALLY AND BEING AGITATED IN SUCH A MANNER THAT ALL COMPONENTS OF THE MIXTURE REACT WITH THE ETHYLENE CONSTANTLY AND WITH AS LITTLE OBSTRUCTION AS POSSIBLE, SAID PROCESS COMPRISING THE ADDITION OF TITANIUM TETRACHLORIDE AND AN ALUMINUM DIA MOLAR RATIO OF 1:1, WHEREBY ETHYLENE POLYMERS ARE FORMED HAVING MOLECULAR WEIGHTS OF 10,000 TO 100,000.
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |