US2996493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefins
Assignee: Sunoco Inc
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Filing: 1958-05-22
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Granted: 1961-08-15
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Expires: 1978-05-22
Abstract
No abstract record available.
Inventors
- 👤 Archibald P Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:53
CPC Classifications
C; C08; C08F; C08F10/00; C08F2410/00; C08F2410/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PREPARATION OF SOLID POLYMERS OF NORMALLY GASEOUS OLEFINS WHICH COMPRISES SIMULTANEOUSLY CONTACTING A NORMALLY GASEOUS OLEFIN MAINTAINED IN AN INERT LIQUID ORGANIC REACTION MEDIUM, AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 200*C., WITH CRYSTALLINE DINICKEL PHOSPHIDE AND A POLYMERIZATION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF THE METAL ALKYLS, METAL HYDRIDES AND ALKYL METAL HALIDES OF THE METALS OF GROUPS II AND III OF THE PERIODIC TABLE, AND RECOVERING A SOLID POLYMER OF THE OLEFIN.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PREPARATION OF SOLID POLYMERS OF NORMALLY GASEOUS OLEFINS WHICH COMPRISES SIMULTANEOUSLY CONTACTING A NORMALLY GASEOUS OLEFIN MAINTAINED IN AN INERT LIQUID ORGANIC REACTION MEDIUM, AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 200*C., WITH CRYSTALLINE DINICKEL PHOSPHIDE AND A POLYMERIZATION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF THE METAL ALKYLS, METAL HYDRIDES AND ALKYL METAL HALIDES OF THE METALS OF GROUPS II AND III OF THE PERIODIC TABLE, AND RECOVERING A SOLID POLYMER OF THE OLEFIN.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |