US2959577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalyst and process
Assignee: Phillips Petroleum Co
•
Filing: 1958-04-02
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Granted: 1960-11-08
•
Expires: 1978-04-02
Abstract
No abstract record available.
Inventors
- 👤 Hogan John Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:17
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS WHICH COMPRISES POLYMERIZING, AT A POLYMERIZATION TEMPERATURE IN THE RANGE 100 TO 500*F., AN ALIPHATIC 1-OLEFIN HAVING FROM 2 TO 8 CARBON ATOMS PER MOLECULE AND NO CHAIN BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION, IN THE PRESENCE OF A CATALYST COMPRISING CHROMIUM OXIDE, IN WHICH AT LEAST PART OF THE CHROMIUM IS HEXAVALENT, SUPPORTED ON A CARRIER COMPRISING AN ALUMINUM SULFATE ITS MAJOR COMPONENT.
Claim 2
Dependent Claim
68 words
A PROCESS WHICH COMPRISES POLYMERIZING, AT A POLYMERIZATION TEMPERATURE IN THE RANGE 100 TO 500*F., AN ALIPHATIC 1-OLEFIN HAVING FROM 2 TO 8 CARBON ATOMS PER MOLECULE AND NO CHAIN BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION, IN THE PRESENCE OF A CATALYST COMPRISING CHROMIUM OXIDE, IN WHICH AT LEAST PART OF THE CHROMIUM IS HEXAVALENT, SUPPORTED ON A CARRIER COMPRISING AN ALUMINUM SULFATE ITS MAJOR COMPONENT.
References Cited (Backward Citations)
US2423612A
Cited
US2825721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |