US3130188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and process for producing olefin polymers
Assignee: Phillips Petroleum Co
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Filing: 1960-10-07
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Granted: 1964-04-21
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Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 John P Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
C; C08; C08F; C08F10/00; B; B01; B01J; B01J21/00; B01J21/12; B01J23/00; B01J23/16; B01J23/24; B01J23/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
A POLYMERIZATION PROCESS WHICH COMPRISES POLYMERIZING ETHYLENE TO A SOLID HOMOPOLYMER AT A TEMPERATURE IN THE RANGE 150 TO 350*F. IN THE PRESENCE OF A CATALYST PREPARED BY DEPOSITING AMMONIUM SILICOFLUORIDE AND AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE AND CHROMIUM COMPOUNDS CALCINABLE TO CHROMIUM OXIDE ON AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA AND THORIA, THE AMOUNT OF SAID AMMONIUM SILICOFLUORIDE DEPOSITED RANGING FROM 0.1 TO 8 WEIGHT PERCENT BASED ON TOTAL CATALYST WEIGHT, HEATING THE RESULTING MIXTURE IN THE RANGE 750 TO 1400*F. FOR A PERIOD OF TIME INTHE RANGE OF 5 MINUTES TO 20 HOURS, THUS LEAVING AT LEAST PART OF THE CHROMIUM IN HEXAVALENT STATE, AND RECOVERING A SOLID POLYMER OF ETHYLENE.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |