Patent US2912423A successfully refreshed from Google Patents.
US2912423A
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Polymerization process
Assignee: Standard Oil Co
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Filing: 1954-09-30
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Granted: 1959-11-10
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Peters
- 👤 Bernard L Evering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:18
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR THE CONVERSION OF ETHYLENE TO A NORMALLY SOLID POLYMER, WHICH PROCESS COMPRISES CONTACTING ETHYLENE WITH A CATALYTIC MIXTURE PREPARED BY THE PROCESS WHICH CONSISTS OF ADMIXING AN AIR3 COMPOUND IN WHICH THE R GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND MONOVALENT HYDROCARBON RADICALS WITH A SILICA-ALUMINA CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF SILICA AND A MINOR PROPORTION OF ALUMINA, EFFECTING SAID CONTACTING AT AN EFFECTIVE POLYMERIZATION TEMPERATURE BETWEEN ABOUT 120*C, AND ABOUT 250*C, AND RECOVERING A NORMALLY SOLID POLYMER THUS PRODUCED.
Claim 2
Dependent Claim
89 words
A PROCESS FOR THE CONVERSION OF ETHYLENE TO A NORMALLY SOLID POLYMER, WHICH PROCESS COMPRISES CONTACTING ETHYLENE WITH A CATALYTIC MIXTURE PREPARED BY THE PROCESS WHICH CONSISTS OF ADMIXING AN AIR3 COMPOUND IN WHICH THE R GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND MONOVALENT HYDROCARBON RADICALS WITH A SILICA-ALUMINA CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF SILICA AND A MINOR PROPORTION OF ALUMINA, EFFECTING SAID CONTACTING AT AN EFFECTIVE POLYMERIZATION TEMPERATURE BETWEEN ABOUT 120*C, AND ABOUT 250*C, AND RECOVERING A NORMALLY SOLID POLYMER THUS PRODUCED.
References Cited (Backward Citations)
US2699457A
Cited
US2731453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |