US2969345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-component alkyl aluminum halide catalysts for olefin polymerization
Assignee: Eastman Kodak Co
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Filing: 1958-03-31
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Granted: 1961-01-24
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Frederick B Joyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:04
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/14; C08F; C08F10/00; C08F110/00; C08F110/04; C08F110/06; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F36/00; C08F36/02; C08F36/04; C08F110/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN THE POLYMERIZATION OF PROPYLENE TO FORM SOLID CRYSTALLINE POLYMER THE IMPROVEMENT WHICH COMPRISES EFFECTING THE POLYMERIZATION IN LIQUID DISPERSION IN AN ORGANIC LIQUID AND IN THE PRESENCE OF A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF A MOLAR RATIO OF ETHYL ALUMINUM DICHLORIDE AND TITANIUM TRICHLORIDE OF 1:05 TO 1:2 AND A MOLAR RATIO OF ETHYL ALUMINUM DICHLORIDE AND TRIS-N,NDIMETHYL PHOSPHORAMIDE WITHIN THE RANGE OF 1:1 TO 1:0.25.
Claim 2
Dependent Claim
67 words
IN THE POLYMERIZATION OF PROPYLENE TO FORM SOLID CRYSTALLINE POLYMER THE IMPROVEMENT WHICH COMPRISES EFFECTING THE POLYMERIZATION IN LIQUID DISPERSION IN AN ORGANIC LIQUID AND IN THE PRESENCE OF A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF A MOLAR RATIO OF ETHYL ALUMINUM DICHLORIDE AND TITANIUM TRICHLORIDE OF 1:05 TO 1:2 AND A MOLAR RATIO OF ETHYL ALUMINUM DICHLORIDE AND TRIS-N,NDIMETHYL PHOSPHORAMIDE WITHIN THE RANGE OF 1:1 TO 1:0.25.
References Cited (Backward Citations)
US2840617A
Cited
US2846427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |