US3332925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing propylene
Assignee: Gulf Research and Development Co
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Filing: 1963-12-23
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Granted: 1967-07-25
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Russell G Hay
- 👤 David M Jenkins
- 👤 Robert A Walde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:57
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR POLYMERIZING PROPYLENE WHICH COMPRISES HEATING A MIXTURE CONTAINING TITANIUM TRICHLORIDE AND AN ALUMINUM ALKYL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS AND ALKYL ALUMINUM HALIDES IN AN INERT ATMOSPHERE AT A TEMPERATURE OF ABOUT 3* TO ABOUT 70*C. FOR ABOUT ONE TO ABOUT 90 MINUTES, ADDING PROPYLENE TO THE RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 10* TO ABOUT 70*C. AND HEATING THE SAME FOR ABOUT ONE TO ABOUT 30 MINUTES AND THEREAFTER SUBJECTING PROPYLENE TO POLYMERIZATION IN THE PRESENCE OF SAID RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 70* TO ABOUT 180*C.
Claim 2
Dependent Claim
97 words
A PROCESS FOR POLYMERIZING PROPYLENE WHICH COMPRISES HEATING A MIXTURE CONTAINING TITANIUM TRICHLORIDE AND AN ALUMINUM ALKYL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS AND ALKYL ALUMINUM HALIDES IN AN INERT ATMOSPHERE AT A TEMPERATURE OF ABOUT 3* TO ABOUT 70*C. FOR ABOUT ONE TO ABOUT 90 MINUTES, ADDING PROPYLENE TO THE RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 10* TO ABOUT 70*C. AND HEATING THE SAME FOR ABOUT ONE TO ABOUT 30 MINUTES AND THEREAFTER SUBJECTING PROPYLENE TO POLYMERIZATION IN THE PRESENCE OF SAID RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 70* TO ABOUT 180*C.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |