US2897183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant environment process for polymerizing ethylene
Assignee: EIDP Inc
•
Filing: 1954-01-13
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Granted: 1959-07-28
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Expires: 1974-01-13
Abstract
No abstract record available.
Inventors
- 👤 Robert J Christl
- 👤 Milton J Roedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:55
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J3/00; B01J3/04; C; C08; C08F; C08F10/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00162; B01J2219/00761; B01J2219/00763; B01J2219/00779; B01J2219/18; B01J2219/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A CONTINUOUS PROCESS FOR THE PREPARATION OF NORMALLY SOLID HOMOPOLYMERS OF ETHYLENE, THE STEP WHICH COMPRISES CONDUCING THE HOMOPOLYMERIZATION OF ETHYLENE AT TEMPERATURES BETWEEN 40*C. AND 350*C. AND PRESSURES BETWEEN 50 AND 3000 ATMOSPHERES AND IN THE PRESENCE OF AN ETHYLENE POLYMERIZATION INITIATOR IN AN ENVIRONMENT IN WHICH THE RATIC OF HOMOPOLYMER TO UNREACTED ETHYLENE THROUGHOUT THE REACTION IS MAINTAINED AT A SUBSTANTIALLY-CONSTANT RATIO BETWEEN 0.05 AND 0.50 BY MAIN-
Claim 2
Dependent Claim
71 words
IN A CONTINUOUS PROCESS FOR THE PREPARATION OF NORMALLY SOLID HOMOPOLYMERS OF ETHYLENE, THE STEP WHICH COMPRISES CONDUCING THE HOMOPOLYMERIZATION OF ETHYLENE AT TEMPERATURES BETWEEN 40*C. AND 350*C. AND PRESSURES BETWEEN 50 AND 3000 ATMOSPHERES AND IN THE PRESENCE OF AN ETHYLENE POLYMERIZATION INITIATOR IN AN ENVIRONMENT IN WHICH THE RATIC OF HOMOPOLYMER TO UNREACTED ETHYLENE THROUGHOUT THE REACTION IS MAINTAINED AT A SUBSTANTIALLY-CONSTANT RATIO BETWEEN 0.05 AND 0.50 BY MAIN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |