US3127387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing polyethylene
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:14
CPC Classifications
C; C08; C08F; C08F10/00; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE PROCESS OF PRODUCING RESINOUS PLYETHYLENE OF INSIGNIFICANT SOLUBILITY N LUBRICATING OIL HAVING A DENSITY ABOVE 0.920, A MELT INDEX OF 0.1 TO 40, A TENSILE YIELD POINT OF 1000 TO 2500 P.S.I., A VICAT SOFTENING POINT OF MORE THAN 100*C. AND A STIFFNESS OF AT LEAST 20,000 P.S.I. BY THE FLEXURAL METHOD, WHICH COMPRISES SUBJECTING ETHYLENE HAVING DISPERSED THEREIN A SMALL AMOUNT UP TO 5 WEIGHT PERCENT BASED ON THE ETHYLENE OF CYCLOHEXENE AND A SUITABLE FREE RADICAL POLYMERIZATION INITIATOR ALSO DISPERSED THEREIN, IN A CONTINUOUS POLYMERIZATION SYSTEM TO A PRESSURE IN THE RANGE OF 12,000 TO 30,000 P.S.I. AND A TEMPERATURE IN THE RANGE OF 50 TO 190*C., WITH THE SPECIFIC TEMPERATURE AND PRESSURE BEING SELECTED TO PRODUCE A RESINOUS POLYMER OF THE SAID PHYSICAL CHARACTERISTICS FOR A RESIDENCE TIME UNDER THE POLYMERIZATION CONDITIONS OF NOT MORE THAN 15 MINUTES AND RECOVERING THE POLYETHYLENE SO PRODUCED.
Claim 2
Dependent Claim
148 words
THE PROCESS OF PRODUCING RESINOUS PLYETHYLENE OF INSIGNIFICANT SOLUBILITY N LUBRICATING OIL HAVING A DENSITY ABOVE 0.920, A MELT INDEX OF 0.1 TO 40, A TENSILE YIELD POINT OF 1000 TO 2500 P.S.I., A VICAT SOFTENING POINT OF MORE THAN 100*C. AND A STIFFNESS OF AT LEAST 20,000 P.S.I. BY THE FLEXURAL METHOD, WHICH COMPRISES SUBJECTING ETHYLENE HAVING DISPERSED THEREIN A SMALL AMOUNT UP TO 5 WEIGHT PERCENT BASED ON THE ETHYLENE OF CYCLOHEXENE AND A SUITABLE FREE RADICAL POLYMERIZATION INITIATOR ALSO DISPERSED THEREIN, IN A CONTINUOUS POLYMERIZATION SYSTEM TO A PRESSURE IN THE RANGE OF 12,000 TO 30,000 P.S.I. AND A TEMPERATURE IN THE RANGE OF 50 TO 190*C., WITH THE SPECIFIC TEMPERATURE AND PRESSURE BEING SELECTED TO PRODUCE A RESINOUS POLYMER OF THE SAID PHYSICAL CHARACTERISTICS FOR A RESIDENCE TIME UNDER THE POLYMERIZATION CONDITIONS OF NOT MORE THAN 15 MINUTES AND RECOVERING THE POLYETHYLENE SO PRODUCED.
References Cited (Backward Citations)
US2327705A
Cited
US2586332A
Cited
US2771463A
Cited
US2868762A
Cited
US2879263A
Cited
US2964515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |