US3236824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing atactic and elastomeric polyolefins and catalyst systems therefor
Assignee: Standard Oil Co
•
Filing: 1962-04-06
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Granted: 1966-02-22
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Expires: 1982-04-06
Abstract
No abstract record available.
Inventors
- 👤 Richard M Wilhjelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE PROCESS FOR THE POLYMERIZATION OF AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ETHYLENEPROPYLENE MIXTURES WHICH COMPRISES HEATING THE OLEFIN AT A TEMPERATURE AND FOR A TIME TO EFFECT POLYMERIZATION IN THE PRESENCE OF A CATALYST PRODUCED BY (1) MIXING (A) A TRINHYDROCARBON ALUMINUM COMPOUND WITH (B) A HALOPHENOL HAVING THE FORMULA:
Claim 2
Dependent Claim
55 words
THE PROCESS FOR THE POLYMERIZATION OF AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ETHYLENEPROPYLENE MIXTURES WHICH COMPRISES HEATING THE OLEFIN AT A TEMPERATURE AND FOR A TIME TO EFFECT POLYMERIZATION IN THE PRESENCE OF A CATALYST PRODUCED BY (1) MIXING (A) A TRINHYDROCARBON ALUMINUM COMPOUND WITH (B) A HALOPHENOL 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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |