Patent US3018255A successfully refreshed from Google Patents.
US3018255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium oxide catalyst for production of solid polymers
Assignee: Phillips Petroleum Co
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Filing: 1958-06-26
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Granted: 1962-01-23
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Expires: 1978-06-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:29
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF PREPARING A CATALYST USEFUL IN THE POLYMERIZATION OF ETHYLENE TO A NORMALLY SOLID POLYMER WHICH COMPRISES IMPREGNATING A SILICA-ALUMINA SUPPORT WITH A VANADIUM SALT OF AN ORGANIC ACID CONVERTIBLE TO THE OXIDE UPON HEATING, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF VANADIUM OXALATE, VANADIUM MALONATE, VANADIUM FORMATE, VANADIUM ACETATE, VANADIUM CITRATE AND VANADIUM TARTRATE, AND ACTIVATING THE IMPREGNATED CATALYST BY HEATING IN AN OXYGEN-CONTAINING ATMOSPHERE AT A TEMPERATURE IN THE RANGE 1100 TO 1600*F. FOR A PERIOD OF TIME SUFFICIENT TO CONVERT THE SALT TO THE OXIDE.
Claim 2
Independent Claim
92 words
A METHOD OF PREPARING A CATALYST USEFUL IN THE POLYMERIZATION OF ETHYLENE TO A NORMALLY SOLID POLYMER WHICH COMPRISES IMPREGNATING A SILICA-ALUMINA SUPPORT WITH A VANADIUM SALT OF AN ORGANIC ACID CONVERTIBLE TO THE OXIDE UPON HEATING, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF VANADIUM OXALATE, VANADIUM MALONATE, VANADIUM FORMATE, VANADIUM ACETATE, VANADIUM CITRATE AND VANADIUM TARTRATE, AND ACTIVATING THE IMPREGNATED CATALYST BY HEATING IN AN OXYGEN-CONTAINING ATMOSPHERE AT A TEMPERATURE IN THE RANGE 1100 TO 1600*F. FOR A PERIOD OF TIME SUFFICIENT TO CONVERT THE SALT TO THE OXIDE.
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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) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |