US3231483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of polyethylene in the presence of a metal oxide on an alumina catalytic support
Assignee: Atlantic Richfield Co
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Filing: 1962-07-10
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Granted: 1966-01-25
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Sherwood M Cotton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:19
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR THE PREPARATION OF POLYETHYLENE WHICH COMPRISES SUBJECTING ETHYLENE UNDER POLYMERIZATION CONDITIONS IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC AMOUNT OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM AND TITANIUM ON A CATALYTIC SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND SILICA-ALUMINA, TO A HIGH ENERGY IONIZING RADIATION DOSE OF ABOUT 1X10**4 TO 3X10**6 REP.
Claim 2
Dependent Claim
67 words
A PROCESS FOR THE PREPARATION OF POLYETHYLENE WHICH COMPRISES SUBJECTING ETHYLENE UNDER POLYMERIZATION CONDITIONS IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC AMOUNT OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM AND TITANIUM ON A CATALYTIC SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND SILICA-ALUMINA, TO A HIGH ENERGY IONIZING RADIATION DOSE OF ABOUT 1X10**4 TO 3X10**6 REP.
References Cited (Backward Citations)
US2825721A
Cited
US2953509A
Cited
US2951796A
Cited
US2903404A
Cited
US2912421A
Cited
US3033844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |