Patent US2921054A successfully refreshed from Google Patents.
US2921054A
Expired / Lapsed
US
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Process for polymerizing olefins
Assignee: Sunoco Inc
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Filing: 1957-06-25
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Granted: 1960-01-12
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Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert M Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:19
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
PROCESS FOR THE PREPARATION OF SOLID POLYMERS OF NORMALLY GASEOUS OLEFINS WHICH COMPRISES FLOWING, UNDER POLYMERIZING CONDITIONS, A NORMALLY GASEOUS OLEFIN GHROUGH A STATIONARY BED OF SOLID CATALYST PARTICLES OF A METAL SUBHALIDE SELECTED FROM THE GROUP CONSISTING OF THE SUBHALIDES OF THE METALS OF GROUP IV, V AND VI OF THE PERIODIC TABLE IN CONTACT WITH AN ALUMINUM TRIALKYL FOR THE CATALYST PARTICLES AND AN INERT, LIQUID REACTION MEDIUM, WHEREBY POLYMER CHAINS OF SAID NORMALLY GASE-
Claim 2
Dependent Claim
77 words
PROCESS FOR THE PREPARATION OF SOLID POLYMERS OF NORMALLY GASEOUS OLEFINS WHICH COMPRISES FLOWING, UNDER POLYMERIZING CONDITIONS, A NORMALLY GASEOUS OLEFIN GHROUGH A STATIONARY BED OF SOLID CATALYST PARTICLES OF A METAL SUBHALIDE SELECTED FROM THE GROUP CONSISTING OF THE SUBHALIDES OF THE METALS OF GROUP IV, V AND VI OF THE PERIODIC TABLE IN CONTACT WITH AN ALUMINUM TRIALKYL FOR THE CATALYST PARTICLES AND AN INERT, LIQUID REACTION MEDIUM, WHEREBY POLYMER CHAINS OF SAID NORMALLY GASE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |