Patent US3291784A successfully refreshed from Google Patents.
US3291784A
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Polymerisation of ethylene in the presence of aluminum trimethyl and titanium-trichloride which has been mixed one minute prior to injection into the reactor
Assignee: Imperial Chemical Industries Ltd
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Filing: 1963-04-26
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Granted: 1966-12-13
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Expires: 1983-04-26
Abstract
No abstract record available.
Inventors
- 👤 Bebbington Frank
- 👤 Rose John Brewster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:15
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02; Y; Y10; Y10S; Y10S526/00; Y10S526/905; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
PROCESS FOR THE HOMOPOLYMERIZATION OF ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A POLYMERIZATION CATALYST IN A POLYMERIZATION REACTOR AT A PRESSURE ABOVE 450 ATMOSPHERES AND A TEMPERATURE NOT EXCEEDING 100*C., AND RECOVERING SOLID POLYETHYLENE, SAID POLYMERIZATION CATALYST HAVING BEEN PREPARED BY MIXING TITANIUM TETRACHLORIDE WITH ALUMIMUM TRIMETHYL WITHIN ONE MINUTE PRIOR TO INTRODUCTION INTO SAID POLYMERIZATION REACTOR.
Claim 2
Dependent Claim
57 words
PROCESS FOR THE HOMOPOLYMERIZATION OF ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A POLYMERIZATION CATALYST IN A POLYMERIZATION REACTOR AT A PRESSURE ABOVE 450 ATMOSPHERES AND A TEMPERATURE NOT EXCEEDING 100*C., AND RECOVERING SOLID POLYETHYLENE, SAID POLYMERIZATION CATALYST HAVING BEEN PREPARED BY MIXING TITANIUM TETRACHLORIDE WITH ALUMIMUM TRIMETHYL WITHIN ONE MINUTE PRIOR TO INTRODUCTION INTO SAID POLYMERIZATION REACTOR.
References Cited (Backward Citations)
US3012023A
Cited
US3051690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |