Patent US2880199A successfully refreshed from Google Patents.
US2880199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of polyolefins
Assignee: Sunoco Inc
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Filing: 1956-11-02
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Granted: 1959-03-31
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Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 James L Jezl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:54
CPC Classifications
C; C08; C08F; C08F6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR THE PREPARATION OF SOLID POLYMERS OF NORMALLY GASEOUS OLEFINS WHEREIN A NORMALLY GASEOUS OLEFIN IS CONTACTED, UNDER POLYMERIZING CONDITIONS, WITH A DISOERSION OF TITANIUM TRICHLORIDE AND AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF METAL ALKYLS, METAL HYDRIDES, METAL BOROHYDRIDES AND ALKALI METAL HYDRIDES IN AN INERT LIQUID REACTION MEDIUM, WHEREBY SOLID POLYMERS OF SAID NORMALLY GASEOUS OLEFIN ARE FORMED, THE IMPROVEMENT WHICH COMPRISES GRINDING SAID SOLID POLYMERS IN CONTACT WITH AN EXCESS OF LIQUID TITANIUM TETRACHLORIDE AT A TEMPERATURE OF FROM 10* C. TO 136* C., AND SEPARATING A SOLUTION OF TITANIUM TRICHLORIDE IN TITANIUM TETRACHLORIDE FROM THE SOLID POLYMER.
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR THE PREPARATION OF SOLID POLYMERS OF NORMALLY GASEOUS OLEFINS WHEREIN A NORMALLY GASEOUS OLEFIN IS CONTACTED, UNDER POLYMERIZING CONDITIONS, WITH A DISOERSION OF TITANIUM TRICHLORIDE AND AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF METAL ALKYLS, METAL HYDRIDES, METAL BOROHYDRIDES AND ALKALI METAL HYDRIDES IN AN INERT LIQUID REACTION MEDIUM, WHEREBY SOLID POLYMERS OF SAID NORMALLY GASEOUS OLEFIN ARE FORMED, THE IMPROVEMENT WHICH COMPRISES GRINDING SAID SOLID POLYMERS IN CONTACT WITH AN EXCESS OF LIQUID TITANIUM TETRACHLORIDE AT A TEMPERATURE OF FROM 10* C. TO 136* C., AND SEPARATING A SOLUTION OF TITANIUM TRICHLORIDE IN TITANIUM TETRACHLORIDE FROM THE SOLID POLYMER.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |