US2887471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of alpha-olefins to solid polymer by means of an alkali metal alkyl and a supported oxide
Assignee: Eastman Kodak Co
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Filing: 1955-11-29
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Granted: 1959-05-19
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Newton H Shearer
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:56
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN THE POLYMERIZATION OF NORMALLY GASEOUS A-MONOOLEFINS CONTAINING 2-10 CARBON ATOMS TO FORM SOLID POLYMER, THE IMPROVEMENT WHICH COMPRISES EFECTING THE POLYMERIZATION IN AN INERT ORGANIC LIQUID IN THE PRESENCE OF AN OXIDE OF A METAL FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM AND TUNGSTEN, AND AN ALKALI METAL ALKYL CATALYST WHEREIN THE ALKYL GROUP CONTAINS 1-12 CARBON ATOMS, AT A TEMPERATURE OF 0-250* C.
Claim 2
Dependent Claim
65 words
IN THE POLYMERIZATION OF NORMALLY GASEOUS A-MONOOLEFINS CONTAINING 2-10 CARBON ATOMS TO FORM SOLID POLYMER, THE IMPROVEMENT WHICH COMPRISES EFECTING THE POLYMERIZATION IN AN INERT ORGANIC LIQUID IN THE PRESENCE OF AN OXIDE OF A METAL FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM AND TUNGSTEN, AND AN ALKALI METAL ALKYL CATALYST WHEREIN THE ALKYL GROUP CONTAINS 1-12 CARBON ATOMS, AT A TEMPERATURE OF 0-250* C.
References Cited (Backward Citations)
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Cited
US2725374A
Cited
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Cited
US2728758A
Cited
US2721189A
Cited
US2824089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |