US2725374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene with alkali metal and group vi a metal oxide
Assignee: Standard Oil Co
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Filing: 1954-01-14
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Granted: 1955-11-29
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Expires: 1974-01-14
Abstract
No abstract record available.
Inventors
- 👤 Robert A Mosher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:06
CPC Classifications
B; B01; B01J; B01J21/00; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J23/28; B01J23/30; C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A PROCESS FOR THE PRODUCTION OF AN ETHYLENE POLYMER HAVING A MOLECULAR WEIGHT GREATER THAN ABOUT 300 WHICH COMPRISES CONTACTING ETHYLENE WITH AN ALKALI METAL AND AN OXIDE OF A METAL OF GROUP 6A OF THE MENDELEEF PERIODIC TABLE AT A REACTION TEMPERATURE BETWEEN ABOUT 75* C. AND ABOUT 325* C., THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONTACTING IN THE PRESENCE OF AN ANHYDROUS HYDROGEN HALIDE IN A MOLAR CONCENTRATION NOT IN EXCESS OF SAID ALKALI METAL BUT SUFFICIENT SUBSTANTIALLY TO INCREASE THE RATE OF ETHYLENE POLYMERIZATION.
Claim 2
Dependent Claim
88 words
IN A PROCESS FOR THE PRODUCTION OF AN ETHYLENE POLYMER HAVING A MOLECULAR WEIGHT GREATER THAN ABOUT 300 WHICH COMPRISES CONTACTING ETHYLENE WITH AN ALKALI METAL AND AN OXIDE OF A METAL OF GROUP 6A OF THE MENDELEEF PERIODIC TABLE AT A REACTION TEMPERATURE BETWEEN ABOUT 75* C. AND ABOUT 325* C., THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONTACTING IN THE PRESENCE OF AN ANHYDROUS HYDROGEN HALIDE IN A MOLAR CONCENTRATION NOT IN EXCESS OF SAID ALKALI METAL BUT SUFFICIENT SUBSTANTIALLY TO INCREASE THE RATE OF ETHYLENE POLYMERIZATION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |