US2887472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of solid polyethylene by a catalyst consisting essentially of an alkali metal and an adsorbent alumina-containing material
Assignee: Standard Oil Co
•
Filing: 1954-09-30
•
Granted: 1959-05-19
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Peter Fotis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:51
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR PRODUCING A SOLID POLYMERIC MATERIAL, WHICH PROCESS COMPRISES CONTACTING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF AN ALKALI METAL HAVING AN ATOMIC NUMBER OF AT LEAST 11 AND AND AN ADSORBENT ALUMINACONTAINING MATERIAL, NOT IN ITSELF AN ETHYLENE POLYMERIZTION CATALYST, SELECTED FROM THE CLASS CONSISTING OF A GAMMA-ALUMINA, ARGILLACEOUS MATERIALS, SYNTHETIC, SILICAALUMINA COMPOSITES AND FLUORIDED ALUMINA, EFFECTING SAID CONTACTING AT A TEMPERATURE BETWEEN ABOUT 50* C. AND ABOUT 200* C. AND AT A PRESSURE OF AT LEAST ABOUT 200 P.S.I. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT A SUBSTANTIAL CONVERISON OF ETHYLENE TO FORM A SOLID POLYMER, AND RECOVERING A SOLID POLYMER THUS PRODUCED.
Claim 2
Dependent Claim
108 words
A PROCESS FOR PRODUCING A SOLID POLYMERIC MATERIAL, WHICH PROCESS COMPRISES CONTACTING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF AN ALKALI METAL HAVING AN ATOMIC NUMBER OF AT LEAST 11 AND AND AN ADSORBENT ALUMINACONTAINING MATERIAL, NOT IN ITSELF AN ETHYLENE POLYMERIZTION CATALYST, SELECTED FROM THE CLASS CONSISTING OF A GAMMA-ALUMINA, ARGILLACEOUS MATERIALS, SYNTHETIC, SILICAALUMINA COMPOSITES AND FLUORIDED ALUMINA, EFFECTING SAID CONTACTING AT A TEMPERATURE BETWEEN ABOUT 50* C. AND ABOUT 200* C. AND AT A PRESSURE OF AT LEAST ABOUT 200 P.S.I. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT A SUBSTANTIAL CONVERISON OF ETHYLENE TO FORM A SOLID POLYMER, AND RECOVERING A SOLID POLYMER THUS PRODUCED.
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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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |