US2870130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymers
Assignee: Union Carbide Corp
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Filing: 1956-01-04
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Granted: 1959-01-20
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Expires: 1976-01-04
Abstract
No abstract record available.
Inventors
- 👤 James M Davison
- 👤 John F Erdmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR PRODUCING SOLID POLYETHLENE RESINS HAVING A DENSITY BETWEEN ABOUT 0.915 AND ABOUT 0.94 GRAM PER CC. AND A CARBONYL CONTENT BETWEEN ABOUT 0.2 AND ABOUT 0.8 CARBONYL GROUP PER 1000 CARBON ATOMS. WHICH COMPRISES HEATING A MIXTURE OF ETHYLENE AND AN ALIPHATIC KETONE, SAID MIXTURE CONTIANING FROM ABOUT 0.05 TO ABOUT 5 MOLES OF ALIPHATIC KETONE PER 100 MOLES OF ETHYLENE, AT A TEMPERATURE BETWEEN ABOUT 90* C AND ABOUT 350* C. UNDER AN ETHYLENE PESSURE ABOUT 1500 ATMOSPHERES IN THE PRESENCE OF A FREE-RADICAL CATALYST. SAID ALIPHATIC KETONE HAVING FROM 3 TO 11 CARBON ATOMS.
Claim 2
Dependent Claim
99 words
A PROCESS FOR PRODUCING SOLID POLYETHLENE RESINS HAVING A DENSITY BETWEEN ABOUT 0.915 AND ABOUT 0.94 GRAM PER CC. AND A CARBONYL CONTENT BETWEEN ABOUT 0.2 AND ABOUT 0.8 CARBONYL GROUP PER 1000 CARBON ATOMS. WHICH COMPRISES HEATING A MIXTURE OF ETHYLENE AND AN ALIPHATIC KETONE, SAID MIXTURE CONTIANING FROM ABOUT 0.05 TO ABOUT 5 MOLES OF ALIPHATIC KETONE PER 100 MOLES OF ETHYLENE, AT A TEMPERATURE BETWEEN ABOUT 90* C AND ABOUT 350* C. UNDER AN ETHYLENE PESSURE ABOUT 1500 ATMOSPHERES IN THE PRESENCE OF A FREE-RADICAL CATALYST. SAID ALIPHATIC KETONE HAVING FROM 3 TO 11 CARBON ATOMS.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |