Patent US2905645A successfully refreshed from Google Patents.
US2905645A
Expired / Lapsed
US
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Polymerization catalysts
Assignee: EIDP Inc
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Filing: 1954-08-16
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Granted: 1959-09-22
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Anderson Arthur William
- 👤 Jr John Macmillan Bruce
- 👤 Merckling Nicholas George
- 👤 Truett William Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:18
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; C08F36/00; C08F36/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A COMPOSITION OF MATTER SUITABLE FOR USE IN THE POLYMERIZATION OF ETHYLENICALLY UNSATURATED COMPOUNDS COMPRISING A SUBSTANTIALLY MOISTURE-FREE INERT LIQUID HYDROCARBON MEDIUM AND A POLYMERIZATION CATALYST CONSISTING ESSENTIALLY OF THE MIXTURE OBTAINED BY TREATING, IN SOLUTION IN SAID MEDIUM, A TITANIUM TETRAHALIDE IN WHICH THE HALOGEN HAS AN ATOMIC WEIGHT NOT IN EXCESS OF THE ATOMIC WEIGHT OF CHLORINE, WITH A REDUCING AGENT OF THE CLASS CONSISTING OF LITHIUM PHENYL, LLAL(R)4 COMPOUNDS WHEREIN R IS A HYDROCARBON RADICAL, AND METAL ALKYLS WHEREIN SAID METAL IS A MEMBER OF THE CLASS CONSISTING OF TIN AND CADMIUM, THE QUANTITY OF SAID REDUCING AGENT BEING SUFFICIENT TO LOWER THE VALENCE STATE OF THE TITANIUM, AT LEAST IN PART, TO BELOW 3.
Claim 2
Dependent Claim
118 words
A COMPOSITION OF MATTER SUITABLE FOR USE IN THE POLYMERIZATION OF ETHYLENICALLY UNSATURATED COMPOUNDS COMPRISING A SUBSTANTIALLY MOISTURE-FREE INERT LIQUID HYDROCARBON MEDIUM AND A POLYMERIZATION CATALYST CONSISTING ESSENTIALLY OF THE MIXTURE OBTAINED BY TREATING, IN SOLUTION IN SAID MEDIUM, A TITANIUM TETRAHALIDE IN WHICH THE HALOGEN HAS AN ATOMIC WEIGHT NOT IN EXCESS OF THE ATOMIC WEIGHT OF CHLORINE, WITH A REDUCING AGENT OF THE CLASS CONSISTING OF LITHIUM PHENYL, LLAL(R)4 COMPOUNDS WHEREIN R IS A HYDROCARBON RADICAL, AND METAL ALKYLS WHEREIN SAID METAL IS A MEMBER OF THE CLASS CONSISTING OF TIN AND CADMIUM, THE QUANTITY OF SAID REDUCING AGENT BEING SUFFICIENT TO LOWER THE VALENCE STATE OF THE TITANIUM, AT LEAST IN PART, TO BELOW 3.
References Cited (Backward Citations)
US2355925A
Cited
US2475520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |