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Patent US2888448A successfully refreshed from Google Patents.
US2888448A
Expired / Lapsed
US
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Coordination catalysts using silver
Assignee: EIDP Inc
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Filing: 1954-09-16
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Granted: 1959-05-26
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Expires: 1974-09-16
Abstract
No abstract record available.
Inventors
- 👤 Gresham William Franklin
- 👤 Merckling Nicholas George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE, AT A TEMPERATURE OF 0 TO 300* C. SND AT A PRESSURE OF 1 TO 200 ATMOSPHERES, IN THE PRESENCE OF AN INERT ORGANIC SOLVENT, WITH FROM 0.001 TO 10 PERCENT BY WEIGHT OF THE ETHYLENE OF A CATALYST OBTAINED BY ADMIXING A SILVER HALIDE WITH A GRIGNARD REAGENT, THE MOLAR RATIO OF SAID GRIGNARD REAGENT TO SAID METAL HALIDE BEING AT LEAST TWO, AND RECOVERING A SOLID POLYMER OF ETHYLENE.
Claim 2
Dependent Claim
80 words
A PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE, AT A TEMPERATURE OF 0 TO 300* C. SND AT A PRESSURE OF 1 TO 200 ATMOSPHERES, IN THE PRESENCE OF AN INERT ORGANIC SOLVENT, WITH FROM 0.001 TO 10 PERCENT BY WEIGHT OF THE ETHYLENE OF A CATALYST OBTAINED BY ADMIXING A SILVER HALIDE WITH A GRIGNARD REAGENT, THE MOLAR RATIO OF SAID GRIGNARD REAGENT TO SAID METAL HALIDE BEING AT LEAST TWO, AND RECOVERING A SOLID POLYMER OF ETHYLENE.
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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |