US2833755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyolefins of improved color by catalytic polymerization with a titanium tetraalkoxide and a monoalkyl aluminum dihalide
Assignee: Eastman Kodak Co
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Filing: 1955-11-29
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Granted: 1958-05-06
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:24
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE POLYMERIZATION OF A-MONOOLEFINIC HYDROCARBON MATERIAL FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE TO FORM SOLID POLYMER, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A CATALYTIC MIXTURE IN A MOLAR RATIO OF FROM 1:4 TO 4:1 OF A TITANIUM TETRAALKOXIDE WHEREIN EACH ALKOXIDE GROUP CONTAINS 1-4 CARBON ATOMS AND A MONOALKYL ALUMINUM DIHALIDE WHEREIN THE ALKYL GROUP CONTAINS 1-12 CARBON ATOMS AND THE HALOGEN ATOMS ARE FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, AND THEREBY FORMING A SOLID HIGH MOLECULAR WEIGHT POLYMER OF IMPROVED COLOR.
Claim 2
Dependent Claim
89 words
IN THE POLYMERIZATION OF A-MONOOLEFINIC HYDROCARBON MATERIAL FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE TO FORM SOLID POLYMER, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A CATALYTIC MIXTURE IN A MOLAR RATIO OF FROM 1:4 TO 4:1 OF A TITANIUM TETRAALKOXIDE WHEREIN EACH ALKOXIDE GROUP CONTAINS 1-4 CARBON ATOMS AND A MONOALKYL ALUMINUM DIHALIDE WHEREIN THE ALKYL GROUP CONTAINS 1-12 CARBON ATOMS AND THE HALOGEN ATOMS ARE FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, AND THEREBY FORMING A SOLID HIGH MOLECULAR WEIGHT POLYMER OF IMPROVED COLOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |