Patent US2989487A successfully refreshed from Google Patents.
US2989487A
Expired / Lapsed
US
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Coordination polymerization catalysts
Assignee: EIDP Inc
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Filing: 1958-09-17
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Granted: 1961-06-20
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Expires: 1978-09-17
Abstract
No abstract record available.
Inventors
- 👤 Truett William Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:39
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE CATALYST COMPOSITION COMPRISING THE REACTION PRODUCT OBTAINED ON ADMIXING AN ALUMIUM TRIHALIDE WITH AN ORGANOMAGNESIUM COMPOUND HAVING AT LEAST ONE HYDROCARBON BONDED TO MAGNESIUM IN AN INERT ORGANIC SOLVENT IN MOLAR RATIOS OF .01 TO 10.
Claim 2
Dependent Claim
37 words
THE CATALYST COMPOSITION COMPRISING THE REACTION PRODUCT OBTAINED ON ADMIXING AN ALUMIUM TRIHALIDE WITH AN ORGANOMAGNESIUM COMPOUND HAVING AT LEAST ONE HYDROCARBON BONDED TO MAGNESIUM IN AN INERT ORGANIC SOLVENT IN MOLAR RATIOS OF .01 TO 10.
References Cited (Backward Citations)
US2899415A
Cited
BE534792A
Cited
FR1134740A
Cited
US2786035A
Cited
BE547618A
Cited
US2900374A
Cited
US2898330A
Cited
US2846427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |