Patent US2885389A successfully refreshed from Google Patents.
US2885389A
Expired / Lapsed
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Polymerization processes
Assignee: Beazer East Inc
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Filing: 1955-07-05
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Granted: 1959-05-05
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Hans M Schappert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A PROCESS FOR PRODUCING SOLID POLYETHYLENE BY CONTACTING ETHYLENE AND A CATALYST IN A REACTION ZONE IN THE PRESENCE OF AN INERT ORGANIC LIQUID SOLVENT AT A TEMPERATURE BELOW THE CATALYST DECOMPOSITION TEMPERATURE AND UNDER PRESSURES OF LESS THAN 100 ATMOSPHERES, IN WHICH THE CATALYST IS A MIXTURE OF (A) AND (B), (A) HAVING THE GENERAL FORMULA RR''AIX, IN WHICH R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL RADICALS AND ARYL RADICALS, R'' IS A MEMBER SELECTED FROM
Claim 2
Dependent Claim
83 words
IN A PROCESS FOR PRODUCING SOLID POLYETHYLENE BY CONTACTING ETHYLENE AND A CATALYST IN A REACTION ZONE IN THE PRESENCE OF AN INERT ORGANIC LIQUID SOLVENT AT A TEMPERATURE BELOW THE CATALYST DECOMPOSITION TEMPERATURE AND UNDER PRESSURES OF LESS THAN 100 ATMOSPHERES, IN WHICH THE CATALYST IS A MIXTURE OF (A) AND (B), (A) HAVING THE GENERAL FORMULA RR''AIX, IN WHICH R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL RADICALS AND ARYL RADICALS, R'' IS A MEMBER SELECTED FROM
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |