Patent US2586322A successfully refreshed from Google Patents.
US2586322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling chain branching during ethylene polymerization
Assignee: EIDP Inc
•
Filing: 1950-06-03
•
Granted: 1952-02-19
•
Expires: 1970-06-03
Abstract
No abstract record available.
Inventors
- 👤 William A Franta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:56
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A PROCESS FOR THE PREPARATION OF A HOMOPOLYMER OF ETHYLENE HAVING A DENSITY BETWEEN 0.925 AND 0.950, A STIFFNESS GREATER THAN 30,000 P.S.I. AND A LOG10 MELT VISCOSITY IN CENTIPOISES AT 190* C. OF BETWEEN 6 AND 9, THE STEP WHICH COMPRISES POLYMERIZING ETHYLENE AT A TEMPERATURE OF APPROXIMATELY 140* C. UNDER A PRESSURE OF APPROXIMATELY 1200 ATMOSPHERES, THERE BEING PRESENT DURING THE POLYMERIZATION PER PART BY WEIGHT OF ETHYLENE 300 P.P.M. OF BENZOYL PEROXIDE, 2.3 PARTS OF WATER8 0.16 PART OF BENZENE AND 0.04 PART OF CYCLOHEXANE.
Claim 2
Dependent Claim
89 words
IN A PROCESS FOR THE PREPARATION OF A HOMOPOLYMER OF ETHYLENE HAVING A DENSITY BETWEEN 0.925 AND 0.950, A STIFFNESS GREATER THAN 30,000 P.S.I. AND A LOG10 MELT VISCOSITY IN CENTIPOISES AT 190* C. OF BETWEEN 6 AND 9, THE STEP WHICH COMPRISES POLYMERIZING ETHYLENE AT A TEMPERATURE OF APPROXIMATELY 140* C. UNDER A PRESSURE OF APPROXIMATELY 1200 ATMOSPHERES, THERE BEING PRESENT DURING THE POLYMERIZATION PER PART BY WEIGHT OF ETHYLENE 300 P.P.M. OF BENZOYL PEROXIDE, 2.3 PARTS OF WATER8 0.16 PART OF BENZENE AND 0.04 PART OF CYCLOHEXANE.
References Cited (Backward Citations)
US2395327A
Cited
US2497323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |