US2909511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization process
Assignee: Hercules Powder Co
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Filing: 1958-11-20
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Granted: 1959-10-20
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Expires: 1978-11-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas Walter William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE PROCESS OF POLYMERIZING A 1-OLEFIN WHICH COMPRISES CONTACTING SAID OLEFIN WITH AT LEAST A CATAYTIC AMOUNT OF A CATALYST, FORMED BY MIXXING TITANIUM TRICHLORIDE WITH A MIXTURE OF MONO- AND DIALKYLALUMINUM HALIDES, SAID MIXTURE OF ALKYLALUMINUM HALIDES HAVING BEEN PRETREATED WITH A HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS 1-A AND II-A OF THE PERIODIC TABLE IN AN AMOUNT OF AT LEAST ABOUT 0.75 MOLE PER MOLE OF MONOALKYLALUMINUM HALIDE IN THE SAID MIXTURE OF ALKYLALUMINUM HALIDES.
Claim 2
Dependent Claim
82 words
THE PROCESS OF POLYMERIZING A 1-OLEFIN WHICH COMPRISES CONTACTING SAID OLEFIN WITH AT LEAST A CATAYTIC AMOUNT OF A CATALYST, FORMED BY MIXXING TITANIUM TRICHLORIDE WITH A MIXTURE OF MONO- AND DIALKYLALUMINUM HALIDES, SAID MIXTURE OF ALKYLALUMINUM HALIDES HAVING BEEN PRETREATED WITH A HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS 1-A AND II-A OF THE PERIODIC TABLE IN AN AMOUNT OF AT LEAST ABOUT 0.75 MOLE PER MOLE OF MONOALKYLALUMINUM HALIDE IN THE SAID MIXTURE OF ALKYLALUMINUM HALIDES.
References Cited (Backward Citations)
US2840551A
Cited
US2846427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |