US2824124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of oxidatively polymerizing ethylene in the presence of methyl formate
Assignee: Escambia Chemical Corp
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Filing: 1955-12-29
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Granted: 1958-02-18
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Nat C Robertson
- 👤 Charles I Tewksbury
- 👤 Nardo Albert Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:13
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN THE NON-CATALYTIC PRODUCTION OF OXYGENATED POLYMERIC MATERIALS OF ETHYLENE CONTAINING A SUBSTANTIAL QUANTITY OF ESTER GROUPS, THE PROCESS WHICH COMPRISES REACTING IN A REACTOR ETHYLENE AND ELEMENTAL OXYGEN IN THE PRESENCE OF A SUBSTANTIAL QUANTITY OF METHYL FORMATE AT A TEMPERATURE ABOVE ABOUT 170*C., INTRODUCING ETHYLENE INTO THE REACTOR AT A RATE TO MAINTAIN THEREIN ETHYLENE PARTIAL PRESSURES BETWEEN ABOUT 500 TO 5000 P. S. I., CONTINUOUSLY INTRODUCING ELEMENTAL OXYGEN AT A RATE OF AT LEAST ONE STANDARD CUBIC FOOT PER HOUR PER CUBIC FOOT OF REACTOR, CONTINUING THE OXIDATIVE POLYMERIZATION UNTIL OXYGENATED POLYMERIC MATERIALS OF ETHYLENE WITH AN AVERAGE MOLECULAR WEIGHT ABOVE 200 AND CONTAINING A SUBSTANTIAL QUANTITY OF ESTER GROUPS ARE OBTAINED, AND RECOVERING SAID POLYMERIC MATERIALS.
Claim 2
Dependent Claim
120 words
IN THE NON-CATALYTIC PRODUCTION OF OXYGENATED POLYMERIC MATERIALS OF ETHYLENE CONTAINING A SUBSTANTIAL QUANTITY OF ESTER GROUPS, THE PROCESS WHICH COMPRISES REACTING IN A REACTOR ETHYLENE AND ELEMENTAL OXYGEN IN THE PRESENCE OF A SUBSTANTIAL QUANTITY OF METHYL FORMATE AT A TEMPERATURE ABOVE ABOUT 170*C., INTRODUCING ETHYLENE INTO THE REACTOR AT A RATE TO MAINTAIN THEREIN ETHYLENE PARTIAL PRESSURES BETWEEN ABOUT 500 TO 5000 P. S. I., CONTINUOUSLY INTRODUCING ELEMENTAL OXYGEN AT A RATE OF AT LEAST ONE STANDARD CUBIC FOOT PER HOUR PER CUBIC FOOT OF REACTOR, CONTINUING THE OXIDATIVE POLYMERIZATION UNTIL OXYGENATED POLYMERIC MATERIALS OF ETHYLENE WITH AN AVERAGE MOLECULAR WEIGHT ABOVE 200 AND CONTAINING A SUBSTANTIAL QUANTITY OF ESTER GROUPS ARE OBTAINED, AND RECOVERING SAID POLYMERIC MATERIALS.
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) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |