US2945015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and process for producing olefin polymers
Assignee: Phillips Petroleum Co
•
Filing: 1955-12-16
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Granted: 1960-07-12
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Expires: 1975-12-16
Abstract
No abstract record available.
Inventors
- 👤 Clyde V Detter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:54
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; C; C08; C08F; C08F10/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN THE POLYMERIZATION OF ALPHATIC 1-OLEFINS THE IMPROVEMENT COMPRISING CARRYING OUT SAID POLYMERIZATION IN THE PRESENCE OF A CHROMIUM OXIDE-PHOSPHORUS OXIDE SUPPORTED CATALYST, SAID CATALYST CONTAINING A PHOSPHORUS TO CHROMIUM ATOM RATIO IN THE RANGE 0.1:1 TO 4:1 AND AT LEAST A PORTION OF THE CHROMIUM BEING IN THE HEXAVALENT STATE.
Claim 2
Dependent Claim
51 words
IN THE POLYMERIZATION OF ALPHATIC 1-OLEFINS THE IMPROVEMENT COMPRISING CARRYING OUT SAID POLYMERIZATION IN THE PRESENCE OF A CHROMIUM OXIDE-PHOSPHORUS OXIDE SUPPORTED CATALYST, SAID CATALYST CONTAINING A PHOSPHORUS TO CHROMIUM ATOM RATIO IN THE RANGE 0.1:1 TO 4:1 AND AT LEAST A PORTION OF THE CHROMIUM BEING IN THE HEXAVALENT STATE.
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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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |