US3216987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene polymerization in the presence of an aluminum alkyl dihalide, titanium trichloride and an alkyl phosphonate
Assignee: Avisun Corp
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Filing: 1962-03-01
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Granted: 1965-11-09
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Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 John A Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:20
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE POLYMERIZATION OF 1-ALKENES FREE FROM BRANCHING AT THE 2 POSITION AND HAVING FROM 2 TO 20 CARBON ATOMS HAVING AT LEAST THREE CARBON ATOMS TO FORM SOLID CRYSTALLINE POLYMERS, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A MIXTURE CONSISTING ESSENTAILLY OF AN ALKYL ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALUMINUM ALKYL DIHALIDES AND SESQUIHALIDES, TITANIUM TRICHLORIDE, AND AN ALKYL PHOSPHONATE HAVING THE FORMULA
Claim 2
Dependent Claim
68 words
IN THE POLYMERIZATION OF 1-ALKENES FREE FROM BRANCHING AT THE 2 POSITION AND HAVING FROM 2 TO 20 CARBON ATOMS HAVING AT LEAST THREE CARBON ATOMS TO FORM SOLID CRYSTALLINE POLYMERS, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A MIXTURE CONSISTING ESSENTAILLY OF AN ALKYL ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALUMINUM ALKYL DIHALIDES AND SESQUIHALIDES, TITANIUM TRICHLORIDE, AND AN ALKYL PHOSPHONATE HAVING THE FORMULA
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |