US2970133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene with catalyst consisting of aluminum chloride and titanium trihalide
Assignee: Ethyl Corp
•
Filing: 1956-01-04
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Granted: 1961-01-31
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Expires: 1976-01-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas O Sistrunk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:30
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS FOR THE PRODUCTION OF A SOLID POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND POLYPROPYLENE WHICH COMPRISES CONTACTING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE WITH A CATALYST AT A TEMPERATURE UP TO 98*C., SAID CATALYST CONSISTING OF A TITANIUM TRIHALIDE AND ALUMINUM CHLORIDE, THE ALUMINUM CHLORIDE TO TITANIUM TRIHALIDE MOLAR RATION BEING LESS THAN 5:1.
References Cited (Backward Citations)
US2899416A
Cited
US1939005A
Cited
US2344213A
Cited
DE874215C
Cited
US2567109A
Cited
US2773836A
Cited
US2721189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |